2. The number of girls in a school accounts for 4/7 of the total number of students in the school. After 8 girls are transferred, the number of girls accounts for 60% of the total number of students in the school. How many students did the school have?
3. A project can be completed in 12 person cooperation 10 day. Now, if it is to be completed four days ahead of schedule, how many people need to be added?
4. A batch of parts were distributed to the apprentice and the master according to1:2. The master made 20 parts per hour, the apprentice made 8 parts per hour, and both of them started work at the same time. Finally, the master finished it 30 minutes earlier than the apprentice. How many parts did the master make?
5. In a math contest, * * * has 20 questions, and every time he does a question correctly, he gets 5 points, and if he does it wrong or not, he will get 1 point, and Xiaohua gets 70 points. Ask him how many questions * * * has done correctly.
6. Party A and Party B set out from A and B, which are10km apart, respectively, and walked in opposite directions, with Party A traveling 4.5km per hour and Party B traveling 3km per hour. When they met for the first time, they walked on. After A arrived at B, they immediately returned at the original speed, and after B arrived at A, they also returned at the original speed. How many hours did they walk when they met for the second time?
7. Please use the four numbers of 5, 5, 5, 1 and pass through the elementary arithmetic (each number can only be used once) to make the result 24.
8。 The simplicity of1+2+3 ...+99+100
Answer: 1 Solution: If one copy is X, the tonnage transported on the first day is X, and the total tonnage is 4x.
X+4.5=4x× 1/3 (the equation is abbreviated)
Substituting the solution x of the equation into 4X, the total tonnage is obtained.
(Short answer)
2 solution: there were x students in the school.
4/7X+8=60%X
(the process of solving equations, the answer is abbreviated)
3 solution: suppose x people need to be added.
1/ 10× 12= 1/6×（ 12+X）
Solution 4: Suppose the master made x parts, then the apprentice made 1/2X parts.
30 minutes = 1/2 hours
X÷20+ 1/2= 1/2X÷8
(A brief answer to the process of solving equations)
Solution 5: Ask Xiaohua to do the X-question correctly.
20-X=5×20-70
(A brief answer to the process of solving equations)
6 solution: suppose two people walked for x hours when they first met.
4.5X+3X= 10
The solution is X=2/ 15.
Substitute X=2/ 15 into 4.5X and 3X.
4.5X=0.6
3X=0.4
10-0.6=9.4
10-0.4=9.6
9.4÷4.5=94/45
9.6÷3=3.2
* * * Time: 2/15+3.2+[10-(94/45-3.2) × 4.5] ÷ 3.
Brief calculation process and answer
7 （5- 1/5）×5=24
8 1+2+3……+99+ 100
= 100+（99+ 1）+（98+2）+（97+3）+……+50
= 150+ 100×49
1. My father, mother and I broke 9 corn respectively, and my little brother broke 6. How many corns did our family break?
2. The rabbit planted 5 rows of radishes, 9 in each row. Give it to grandma rabbit 15, how many are left?
3. Master Wang made 80 loaves of bread and sold 17 for the first time and 25 for the second time. How many loaves are left?
4. Mom bought 15 apples, and bought 6 fewer oranges than apples. How many fruits did * * * buy?
There are four pandas in the zoo, and there are three times as many monkeys as pandas. How many pandas and monkeys are there?
There are 90 books in the library. I borrowed 20 books from grade one and 17 books from grade two. How many books are there in the library?
7.2. There are girls 15 in Class 1, and there are more boys than girls 1 1 person. Question 2. How many students are there in Class 1?
8. A car can seat 4 people, a bus can seat 25 people, and there are 3 cars and 1 bus. How many people can a * * * seat?
9. There are 4 boxes of balls in the shop, 6 in each box, and 20 have been sold. How many are left?
10. Xiaoming has 6 sets of pictures, each with 3 pictures, but he bought 4 pictures. How many are there now?
1 1. The school bought three boxes of table tennis balls, each with eight, and distributed them to four classes in Grade Two on average. How many table tennis balls did each class get?
12. The bear picked up 9 corns, and the monkey picked up 4 times as much as the bear. How many corns did they pick up?
13. The grocery store has 85 tins of coke, 46 tins in the morning and 30 tins in the afternoon. How many tins are left?
14. There were 16 students on the playground, and there were 14 students again. These students play games in groups of five. How many groups can they be divided into?
15. Xiaoming bought three notebooks and used them to 12 yuan. Xiaoyun also bought the same six notebooks. How much did Xiaoyun spend?
16. There are 60 badminton rackets in the sports room. Xiaoming borrowed 15 pairs and Xiaoliang borrowed 26 pairs. How many pairs are left now?
17. A small bucket of milk costs 5 yuan money, which is four times that of a small bucket. How much does it cost to buy two buckets of milk * * *?
18. A story book. Xiao Ming reads 5 pages every day for 9 days, and there are 28 pages left. How many pages does this book have?
19. Teacher Wang bought five green cards at the stationery store, 15 red cards. How many times is red card paper more than green card paper?
20. There are 20 boys and 22 girls in Class One, Grade Two. They are divided into 6 groups on average. How many students are there in each group?
2 1, there are 42 people on an air-conditioned car, 8 people got off midway and got up again 16 people. How many people are there on the car now?
22. The bakery made 54 loaves, the first group of children bought 8 loaves, and the second group of children bought 22 loaves. How many loaves are left now?
23. Group I * * * collected 94 cans, of which Group I collected 34 cans and Group II collected 29 cans. How many cans did the third group collect?
24. The new computer company has 87 computers. It sold 19 in the morning and 26 in the afternoon. How many computers are left? (Answer in two ways)
25. There are 22 pieces of lacquered paper in the class, and 27 pieces have been bought. 38 cards were used for the party. How many cards are left?
26. The Children's Palace has newly purchased 52 violins, and the viola is 20 less than the violin. How many two kinds of violins are there?
27. There are 36 passengers in a bus. Eight passengers get off Fuzhou Road and get on 12. How many passengers are there in the bus at this time?
28. The number of A is 20, and the number of B is 5 more than that of A. What is the number of B?
29. There are 25 apples, and there are 7 fewer pears than apples. How many pears are there?
30. Xiaoqing has 28 pictures, with more photos than pictures 16. How many photos does Xiaoqing have?
3 1, there are 35 boys, 2 more boys than girls, how many girls are there?
32. There are 35 boys, 2 boys are less than girls, and how many girls are there?
There are 20 black bears in the zoo. There are 8 more black bears than white bears. How many white bears are there?
34. There are 20 black bears in the zoo. There are 8 more white bears than black bears. How many white bears are there?
35. There are 44 cocks in the red scarf chicken farm, and there are more hens than cocks 16. How many hens are there?
36. There are 60 hens in the red scarf chicken farm. There are more hens than cocks 14. How many cocks are there?
37. There are 60 hens in the red scarf chicken farm, and there are fewer cocks than hens 14. How many cocks are there?
38. There are 44 cocks in the red scarf chicken farm, and there are fewer cocks than hens 16. How many hens are there?
39. In the handicraft class, Class One saved 15 sheets of paper, and Class Two saved 8 sheets more than Class One. How many sheets of paper did Class Two save?
40. In the handicraft class, Class One saved 15 sheets of paper, 8 sheets more than Class Two. How many sheets of paper did Class Two save?
4 1, there are fewer story books on the shelf than comic books 15, there are 8 magazines and 32 story books on the shelf. How many comic books are there? How many storybooks and comic books are there?
42. Xiaoming's mother bought a rope with a length of 16 meters, cut off some for skipping, and there are still 6 meters left. How many meters does it take to jump rope?
43. There are 35 male students and 37 female students in Grade Two. How many are there in Grade One? Among them, 50 people took part in the "Red Tour" this summer. How many people didn't take part in the "Red Tour"?
44. There are 65 cars in the parking lot, and 3 1 car has been driven away. How many cars are left? Six more came. How many cars are there in the parking lot now?
45. An application problem workbook, with 50 application problems, red does 5 problems every day, and how many days do you finish it?
46. The school bought 6 science and technology books and 36 story books. How many times are the story books?
47. The bookstore sold 6 boxes of books on the first day, and sold 18 boxes of books on the second day. How many times did it sell on the second day? How many boxes are sold in two days?
48. There used to be 45 chickens in Xiaoming's chicken coop. Mom sold 12 last week and 15 this week. How many chickens are left in the chicken coop?
49. There are five groups of students in Class One, Grade Two, with an average of five in each group. 8226; There are 2 1 people participating in the chorus in the first festival. How many people didn't join the chorus?
50. Obana's father and mother competed to do calculations, and Xiaohua got six calculations right in one minute. Dad's was four times as big as Xiaohua's, and mom got five fewer. How many things does mom do right in a minute?
5 1 There are five red balls in Class One, Grade Two. The number of yellow balls is three times that of red balls. How many more yellow balls are there than red balls?
52. Mom bought 12 apples and 16 pears. If you want to put them all in bags, each bag can only hold 4 fruits. How many bags do you need?
53. 8 yuan has to pay for four bags of biscuits in the supermarket, and how much does it cost to buy eight bags of biscuits?
54. The teacher has 8 bags of table tennis, 6 in each bag, and lent them to classmates 15. How many are left? 55. The teacher took 70 yuan to buy books and bought seven sets of story books, each set of 9 yuan. How much is left?
56. There are 9 willows planted in the green belt. The number of pine trees is three times that of willow trees, and the number of willow trees is three times that of poplar trees. How many pine trees are there in the green belt? How many poplars are there?
57. In math class, children play games. Every five people are divided into six groups. How many children are there in one group?
Application exercises in the second volume of the second grade of primary school mathematics (2)
1. Students take part in labor. There are 26 people in Class Two (1) and 38 people in Class Two (2). Every 8 people are organized into a group. How many groups can you organize?
There are 45 people visiting East Lake. Among them, 15 people go to visit the botanical garden, and the rest go boating. Each boat takes 6 people. How many boats do you need?
3. Miss Li has money from 50 yuan. I bought three small soccer balls and went to 36 yuan. The rest of the money was just enough to buy two rackets. How much is each racket?
4. The store sold 5 packets of white sugar and 2 packets of brown sugar, with an average of 3 yuan dollars per packet. How much did it cost?
5. The teacher has 4 boxes of ping-pong balls, 6 for each box, and 8 for students. How many does the teacher have now? (write comprehensive)
6. The breeder keeps 10 cocks and 14 hens. Every four hens are put into a cage. How many cages do you need? (write comprehensive)
7. Mom bought 9 peaches, and Dad bought 15 peaches. Put these peaches in 4 plates on average. How many peaches are put in each plate? (write comprehensive)
8. Mom bought a pair of leather shoes for 52 yuan and a pair of cloth shoes for 12 yuan, and paid the salesperson 100 yuan. How much should I get back? (Answer in two ways)
9. There are 72 white rabbits and 9 puppies. How many times are there white rabbits?
10, 56 peaches are distributed to 7 monkeys on average. How many are each monkey?
1 1, the store has 60 bicycles, which have been sold for 4 days, and 8 bicycles are sold every day. How many bicycles are left?
12. There are 550 color TV sets in Hai Yin Electric Shopping Mall, and 240 have been shipped. After selling some, there are still 320 sets left. How many sets have been sold?
13. There are two groups of monkeys, 9 in each group. Now they are divided into three groups on average. How many monkeys are there in each group?
14. There are 32 students in Class One and 40 students in Class Two in Grade Two. Every 8 students play games in a group. How many groups can they play?
15. The store originally had 25 baskets of oranges. After selling 18 baskets, 40 baskets were brought in. At this time, how many baskets of oranges did the store have?
16. The store brought in 50 baby carriages last week and 48 this week, and sold 17. How many baby carriages are there in the store now?
17. There are 8 rows of pine trees in the campus, with 7 trees in each row. 37 pine trees have been watered, how many trees are not watered?
18. The store has 7 boxes of pens, each containing 8 pens, and 28 pens have been sold. How many pens are left?
19. (1) The school bought 54 boxes of chalk and used 34 boxes. How many boxes are left? (2) The school bought 30 boxes of white chalk and 24 boxes of colored chalk, and used 34 boxes. How many boxes are left?
20. The fruit shop delivered a batch of apples, and sold 16 baskets in the morning and 18 baskets in the afternoon, leaving 12 baskets. How many baskets were delivered?
2 1. There are 4 rows of apple trees in the orchard, 8 trees in each row, and 12 pear trees. How many fruit trees are there in a * * *?
22. The school bought 54 boxes of chalk and used 34 boxes. How many boxes are left? (2) The school bought 30 boxes of white chalk and 24 boxes of colored chalk, and used 34 boxes. How many boxes are left?
23. The fruit shop delivered a batch of apples, and sold 16 baskets in the morning and 18 baskets in the afternoon, leaving 12 baskets. How many baskets were delivered?
24. There are 4 rows of apple trees in the orchard, 8 trees in each row, and 12 pear trees. How many fruit trees are there in a * * *?
25. Select the relevant conditions and questions to form a two-step calculation application problem.
① There are 4 bags of sugar; ② There are 2 bags of brown sugar; ③ Each bag of sugar weighs 2 kilograms; ④ 4 kilograms of sugar are sold; ⑤ How many kilograms of sugar are left? 6. How many kilograms is brown sugar less than white sugar?
26. The teacher has 4 boxes of table tennis, 6 in each box, and 8 are lent to classmates. How many do the teacher have now?
27. Compare what is the same and what is different in the following set of questions, and then answer them.
(1) There are 15 bags of rice in the canteen, and 40 bags have been bought. How many bags of rice are there now?
(2) There were 42 bags of rice in the canteen, but 27 bags were used and 40 bags were bought. How many bags of rice are there now?
28. There are 27 male students and 2 female students in Class Two (1). If there are 8 people in each row, how many rows can there be?
29. Bread: every 3 yuan, biscuits: every pack of 4 yuan, drinks: every bottle of 6 yuan; Xiao Gang: How much should I pay for four loaves of bread and 1 bottle of drinks?
Xiaoqiang has 50 yuan. How much did you get back from buying 5 packets of biscuits?
30. Who bought it cheaply? How much is each cheaper?
Boy: 5 pencils 15 yuan. Girl: My pens are each 4 yuan. Who is cheaper? How much cheaper is each one?
3 1 wang hong went to the supermarket to buy a schoolbag, a pair of sneakers and a football. The price tag is: schoolbag 28 yuan, sneakers 35 yuan, football 26 yuan. How much money should wang hong take to the supermarket?
32. There are 42 students in Class 1, Grade 2, 38 students in Class 2 and 39 students in Class 3 in Bailou Primary School. How many people are there in Class One, Grade Two and Class Two, Grade Two? How many people are there in Class 3, Grade 2 than Class 1, Grade 2?
33. There are volleyball 18 in the school gym, and the number of football is more than volleyball 15. How many volleyball and football are there in the school gym?
34. There are 46 baskets of fruit in the fruit shop, 28 baskets were sold in the morning and 2 1 basket was brought in in the afternoon. How many baskets of fruit do the fruit shop have now?
35. There were 23 passengers on a bus. Eight people got off at the first stop and got on 1 person. How many people are there on the bus now?
36. The fruit shop brought in 75 boxes of apples, and sold 24 boxes on the first day and 18 baskets the next day. How many baskets of apples are there in the fruit shop?
37. There were 28 girls and 20 boys in Class 1, Grade 2, and the new school year began, and 9 students were transferred. How many people are there in Class One, Grade Two now?
38. Three groups repaired 52 chairs, the first group repaired 20 chairs and the second group repaired 18 chairs. How many were repaired by the third group?
39, a pair of slippers 8 yuan, a pair of socks 4 yuan. Xiao Ming took 20 yuan money to buy a pair of slippers and socks. How much should he get back?
40. There are 96 story books in the library, 28 in the first week and 30 in the second week. How many books are there now?
4 1, there were 35 dragonflies and butterflies among the flowers, 6 flew away and came again 12. How many dragonflies and butterflies are there among the flowers now?
42. There are 35 trucks and 24 cars in the parking lot. It's gone 17. How many cars are there now?
Xiao Ming made 18 green flags and 32 red flags. Give it to kindergarten 14 noodles. How many noodles does Xiaoming have now?
44. The baker made 54 loaves, Xiaoming bought 19 loaves and Xiaohong bought 25 loaves. How many more can you buy?
45. Three teams caught 42 bugs, the first team caught 18 and the second team caught 16. How many bugs did the third team catch?
46. There were 46 passengers on the bus. After arriving at the station, they got off 19 and got on again 15. How many people are there in the car now?
47. There are 5 1 person in Class Two (2), 25 people skipping rope and 8 people patting the ball. The rest play football. How many people play football?
There are 73 trees, 26 apple trees and 38 apricot trees in the orchard. The rest are peach trees. How many peach trees are there?
49. There are 45 people doing exercises, including 3 rows of girls with 6 people in each row. How many boys are there?
50. Grapes, apples, Sydney and bananas
18 yuan 20 yuan 7 yuan 3 yuan
(1) How much is an apple more expensive than a banana?
(2) How much do Sydney and bananas cost?
(3) How much is an apple more expensive than a grape?
How much is grapes more expensive than Sydney?
5], apples and grapes a * * * how much?
[6], can you ask any questions?
5 1. The store originally had 25 baskets of oranges. After selling 18 baskets, 40 baskets were brought in. How many baskets of oranges did the store have?
52. The store brought in 50 baby carriages last week and 48 more this week, and sold 17. How many baby carriages are there in the store now?
53. There are 8 rows of pine trees in the campus, with 7 trees in each row. 37 pine trees have been watered, how many trees are not watered?
54. The shop has 7 boxes of pens, 8 pens in each box, and 28 pens have been sold. How many pens are left?
55. (1) The school bought 54 boxes of chalk and used 34 boxes. How many boxes are left?
(2) The school bought 30 boxes of white chalk and 24 boxes of colored chalk, and used 34 boxes. How many boxes are left?
56. The fruit shop delivered a batch of apples, and sold 16 baskets in the morning and 18 baskets in the afternoon, leaving 12 baskets. How many baskets were delivered?
57. There are 4 rows of apple trees in the orchard, each with 8 trees, and 12 pear trees. How many fruit trees are there in a * * *?
58. Mom bought some apples. On the first day, she ate half of them, and the next day, she ate the remaining half. Finally, there were two apples left. How many apples did Mom buy?
59. Xiaoming is 8 years old and Xiaohong is 12 years old. 15 years later, how old is Xiaohong than Xiaoming?
60. The teacher took four students to the movies, and everyone had to buy a ticket. How much does it cost for each ticket to 5 yuan?
61.There used to be 28 people in a bus. After arriving at the station, 8 people got off and got up again. 1 1 person, how many people are there in the bus now?
62. The fruit shop delivered 22 baskets of apples and 18 baskets of pears. There were as many oranges as apples. How many baskets of three kinds of fruits were delivered?
63. I quietly wrote big characters for six days. I wrote three pieces of paper every day for the first five days, and practiced four pieces of paper on the last day. How many pieces of paper did I write quietly?
64. Xiaoming has 18 yuan money, Xiaohong has 24 yuan money, and how much should Xiaohong give Xiaoming, so they have the same amount of money?
65. A river bank is 12 meters long, and a tree is planted every 4 meters. How many trees are planted from beginning to end?
66. A big shark, its tail length is half of its body length, and its head length is half of its tail length. It is known that its head length is 3 meters. What is the total length of this big shark?
1, this book has 680 pages. Xiaochen read 328 pages on the first day and 285 pages on the second day. How many pages are left in this book?
Dad brought money from 980 yuan. It costs 276 yuan to buy a bicycle and an electric fan 189 yuan. How much money does Dad have left?
3. Xiaoming has 186 pictures, 98 for Xiaofang and 35 for Xiaoyun. How many cards does Xiaoming have left?
There are 684 story books in the school library. The first-year students borrowed 179 copies, and the second-year students borrowed 134 copies. How many story books are left in the library?
5. Grandpa Wang keeps 348 chickens. I sold 156 yesterday and 97 today. How many chickens does Grandpa Wang have left?
6. Class 2 (1) has boys 19 and girls 14. Class two (2) has two fewer people than Class two (1). How many people are there in Class Two (2)?
7. The farm has 348 cocks and 295 hens. There are 68 more ducks than chickens. How many ducks are raised on the farm?
8. Students made 208 red flowers and 0/67 yellow flowers. The number of green flowers is 59 fewer than the total number of red flowers and yellow flowers. How many green flowers do you make?
9. Xiaoyun has stamps 138, and Xiaojun has stamps 175. Xiaoming has 37 more stamps than Xiaoyun and Xiaojun combined. How many stamps does Xiaoming have?
10, the school used to have 680 exercise books, and 478 were used. I bought another 350 copies. How many exercise books are there in the school now?
1 1, there were originally 37 people in the bus, and they got off at Xiaozhuang Station 19 people, and then they got up at Xincun Station for 8 people. How many people are there in the car now?
12. There used to be 95 pieces of white paper. Last week, 67 pieces were used, and this week, 53 pieces were bought. How many sheets of white paper does Xiao Fang have now?
13, there are 17 people in the sports team and 45 people in the chorus. The number of dance teams is 4 less than the total number of sports teams and chorus. How many people are there in the dance team?
14. Xiao Ming read a 430-page book. On the first day, he read 147, and the next day, he read 108. How many pages has Xiao Ming left in this book?
15. Grandma keeps 24 chickens, and there are more ducks than chickens 16. There are 8 fewer geese than ducks. How many geese does grandma keep?
16. There are 235 skipping ropes in the gym. 87 were lent in the morning and 104 in the afternoon. How many skipping ropes are left?
17, students make paper flowers. Make 258 red flowers, yellow flowers 175, and 64 white flowers. How many flowers did the students make?
18, Xiaodong has 248 pictures, 39 for Xiaofang and 73 for Xiaoming. How many pictures does Xiaodong have left?
19, students clap the ball. Xiaojun shot 108, Xiaohong shot 47 times more than Xiaojun, and Xiaofang shot less than Xiaohong 13. How many times did Xiao Fang take pictures?
20. There used to be 43 people on a bus. 24 people got off at the central station, and 5 people got off at the Garden Station. How many people are there in the car now?
2 1 Xiaoming spends 80 cents on a pencil and 50 cents on an eraser. He paid 2 yuan, the shop assistant. How much should I get back?
22. Students make paper flowers. Make 37 1 flower of red flowers and 0/68/flower of yellow flowers. The number of white flowers is 35 less than the total number of red flowers and yellow flowers. How many white flowers do students make?
23. Miss Li has 4 15 exercise books, which are distributed to 196 second-year students and 208 first-year students. How many books does Miss Li have left?
There are 286 cocks and 357 hens on the farm. There are only a few Abby Mallard chickens 194. How many ducks are raised on the farm?
25. The train started from Yangzhou Station, with 343 people on board, got off at Zhenjiang Station 167 people, and got up at Nanjing Station with 209 people. How many people are there on the train at this time?
26. There are 47 boys and 55 girls in Grade Two. There are more students in Grade 3 than Grade 2 14. How many students are there in Grade 3?
27. The students made paper flowers. The first group made 168 flowers, the second group made 204 flowers, and the third group made as many as the second group. How many flowers did three groups make?
28. The students went to plant trees, and 47 trees were planted in Grade One and 54 in Grade Two. The total number of trees planted in Grade Three was less than that planted in Grade One and Grade Two 17. How many trees were planted in the third grade?
29. Xiao Fang reads a 548-page book. I read 146 on the first day and 207 on the second day. How many pages are left in this book?
Xiao Ming has 34 red balls, 28 yellow balls and 76 white balls. How many balls does Xiao Mingyi have?
3 1, the army has 309 paintings, and Fangfang has 196 paintings. Xiaohong is 254 fewer than the total number of military and Fangfang. How many pictures does Xiaohong have?
32. The school bought 89 balls, of which 25 were basketball, 37 were volleyball and the rest were rubber balls. How many balls are there?
33. Forty-five poplars were planted, with fewer willow trees 17 and more Metasequoia trees/3 1 tree. How many Metasequoia trees are there?
34. Students make paper flowers. Make safflower 107, 35 yellow flowers and 26 white flowers. How many more flowers do you make red flowers than the total number of yellow flowers and white flowers?
Xiaohong has 64 pieces of paper. 27 sheets were used for making paper flowers and 19 sheets for making paper boats. How many pieces of paper does Xiaohong have left?
36. There were 967 people on a train. 288 people went down first, and then came up again 105 people. How many people are there on the train now?
37. There used to be 43 apples at home, but my mother bought 15 and Xiaoming ate 19. How many apples are there now?
There used to be 543 fairy tale books in the library. Lend the second grade 106, and lend the third grade 264. How many books are left?
39. The school held a sports meeting. The boys in Class Two (1) got 28 points, while the girls got 24 points. Class Two (2) got 5 points more than Class Two (1). How many points did Class Two (2) get?
40. There are 4 boxes of rubber balls in the shop, 6 in each box. 20 sold, how many are left?
4 1, there are 32 passengers in a car, and 9 people get off at the post and telecommunications building. Come up again 13 people, how many passengers are there in the car at this time?
42. In the third grade, I bought 18 science and technology books and 24 story books. Distribute these books to six classes in grade three on average. How many books are distributed to each class on average?
43. The school carried out tree planting activities and returned 76 saplings. The fifth grade took 27 trees, and the sixth grade took 33 trees. How many seedlings are left?
44. The kindergarten bought 48 white balls and 24 colored balls, which were distributed to 9 classes on average. How many did each class get?
45. Xiao Fang reads a book for five pages every day, and after nine days, there are 56 pages left. How many pages is this book?
46. The school bought chalk. There are 42 boxes of white chalk and 39 boxes of colored chalk. How many boxes of white chalk did you buy?
47. The students participated in the training of the square team. There were 34 students in the third grade and 47 students in the fourth grade. Every 9 people had a row. How many rows should they row?
48. On Arbor Day, the fourth and fifth grade students planted 108 willow trees, and also planted 3 rows of poplars with 7 trees in each row.
(1) How many poplar trees are fewer than willow trees?
(2) How many trees are there in the fourth grade than in the fifth grade?
(3) How many trees are planted in the fourth and fifth grades?
49. Originally, 22 people went to the theatre, and 13 people came and 6 people left. How many people are going to the theatre now?
50. The bakery made 54 loaves of bread. The first group bought 22 loaves and the second group bought 8 loaves. How many loaves are left?
5 1, there are 22 boys and 2 1 girls, among whom 16 people participated in the competition. How many people did not participate?
52. Three groups * * * collected 94 mineral water bottles, the first group collected 34, the second group collected 29, and the third group collected how many?
53. There were 4 1 people in the car, and 13 people got on the bus and 9 people got off. How many people are there in the car now?
54. Xiaohong has 28 balloons and Xiao Fang has 24 balloons, which are given to kindergarten children 15. How many balloons are left?
55. Xiaojun and Xiaoli made lanterns, Xiaojun made 2 1 piece, Xiaoli made 18 pieces, and gave them to teachers for 50 pieces. How many more will they make?
1, there are 42 people on an air-conditioned car, 8 people got off midway and got on 16 people. How many people are on the car now?
2. The bakery made 54 loaves, the first group of children bought 8 loaves, and the second group of children bought 22 loaves. How many loaves are left now?
3. Group 1 * * collected 94 cans, of which the first group collected 34 cans and the second group collected 29 cans. How many cans did the third group collect?
The new computer company has 87 computers. It sold 19 in the morning and 26 in the afternoon. How many computers are left? (Answer in two ways)
5. There are 22 pieces of lacquered paper in the class, and 27 pieces have been bought. 38 cards were used for the party. How many cards are left?
6. The Children's Palace has newly purchased 52 violins, and the viola is 20 less than the violin. How many two kinds of violins are there?
7. There are 36 passengers in a bus, 8 passengers get off Fuzhou Road and get on 12. How many passengers are there in the bus at this time?
8. The number of A is 20, and the number of B is 5 more than that of A. What is the number of B?
9. There are 25 apples, 7 fewer pears than apples. How many pears are there?
10, Xiaoqing has 28 pictures, with more photos than pictures 16. How many photos does Xiaoqing have?
1 1, there are 35 boys, 2 more boys than girls, how many girls are there?
12, there are 35 boys, 2 boys are less than girls, how many girls are there?
13. There are 20 black bears in the zoo. There are 8 more black bears than white bears. How many white bears are there?
1, 3 monkeys picked 15 peaches. How many peaches can 9 monkeys pick? (6 points)
2. Xiaoyong has 8 sheep and 32 goats. How many times are there goats? (5 points)
3.( 1) How many times is the price of an alarm clock more than that of a pencil case? (5 points)
(2) How many pencil cases can I buy with the money for six boxes of chalk? (6 points)
4. The vegetable station delivered 900 kilograms of vegetables, sold 450 kilograms and delivered 280 kilograms. Now,
How many kilograms of vegetables are there in the vegetable stand? (6 points)
5. How many boxes are left? (6 points)
6. Students watered trees. Class 2 (1) watered 500 poplars and Class 2 (2) watered 600 willows. How many trees were watered in one class? How many trees have Class Two (1) watered less than Class Two (2)? (10)
7. How much did a * * * cost? (6 points)
8. In the second grade, 96 parents held a parent-teacher conference, and 57 chairs have been moved. How many chairs are still missing? (5 points)
9. Use 15 square blocks. (6 points)
(1) Put five identical cuboids, and each cuboid uses () wooden blocks.
(2) Each cuboid uses 3 wooden blocks, and () cuboids can be placed.
10, mother and daughter made red flowers, mother made 58 flowers and daughter made 50 flowers. How many flowers does a mother give her daughter, and they both have the same number of flowers? (10)
These questions are so simple! I believe that with your intelligence, you can do without an answer!