How to recite multiplication formula quickly

Recently, many students can't recite multiplication formulas. Parents ask me if there are any good methods. In fact, the multiplication formula is only a little bit, as long as you read and write every day, recite line by line, the first line is well recited, and then the next line is recited, and then the next line is recited together, and then the third line is recited, and the third line is recited again and again. . Keep repeating it like this, plus parents reminding and asking questions (disrupting the order), and children will soon master it. If you must ask what skills you have, then I will talk about a little trick:

From 1 to 5, you can make him think: 22 is two additions, 33 is three additions, 4 is four additions, and 5 is five additions. If children understand the meaning of multiplication, they can quickly find out how to get the number, and then help them find the law of product so that they can remember it skillfully. So that they can master it quickly.

Some special ones are singled out: for example

3824 and 4624 versus 6742

274 to 5840

4936 and 6636 versus 79613

298 and 368 versus 9981

Three, four, twelve and two, sixty-two, four, five, twenty

Six, nine, four, five, nine, four, five

8972 to 3927

The following numbers are the other way around. Twenty-eight-six is the same as forty-six. (Pick out the above "AND" numbers, and there will be such a problem in future math problems-write several different formulas to make the product the same.)

Nine is special and easy to remember: you can let your child stretch out his hands. One nine, let him bend his left thumb. If you look at the two hands, you will get nine. Twenty-nine, you will let him bend the second finger of his left hand. The left of the bent finger is 1 for ten digits, and the left of eight digits for the right is eighteen. Three nine, you will let him bend the third finger of his left hand. There are two left fingers and seven on the right, so it is twenty-seven. . And so on, quickly mastered.

A few special ones should also be remembered:

5*3= 15 6*6=36 8*6=48 2*6= 12 4*6=24

5*5=25 5*7=35 5*9=45 The first multiplier of these formulas is the same as the single digit of the product, and similar problems will be achieved in the future: Fill the following boxes with the same number (or integer tens) to make the equation hold: □ * 3 =1□ * 6 = 4 □.

I hope I can help you, and I hope your children can learn multiplication formula by heart as soon as possible, so as to lay a good foundation for future study!

How can I remember the multiplication table quickly?

Characteristics of formula

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1, 99 tables generally use only 9 numbers from one to nine.

2. Jiujiu table contains the commutativity of multiplication, so it only needs 8972, without "9872", 9 times 9 has 8 1 product, and Jiujiu table only needs 1+2+3+4+5+6+7+8+9 =45 product. In the Ming Dynasty, there were also nine tables with 8 1 product in abacus calculation. The 99 table of 45 items is called Xiao 99, and the 99 table of 8 1 item is called Da 99.

3. The shortest multiplication table in the ancient world. Maya multiplication table must be 190, Babylon multiplication table must be 1770, and Egypt, Greece, Rome, India and other countries must have infinite multiplication tables; Only 45/8 1 item is needed for the 99-99 table.

4. There is a rhythm when reading aloud, which is convenient for memorizing the whole table.

5. Jiujiu Watch has existed for at least 3,000 years. It was used in the calculation from the Spring and Autumn Period and the Warring States Period, and was improved and used in the abacus in the Ming Dynasty. Jiujiubiao is also the basic skill of elementary school arithmetic.

6, another nine:

9X9=8 1 8+ 1=9

9X8=72 7+2=9

9X7=63 6+3=9

: : .

: :

: :

9X2= 18 1+8=9

9X 1=9 0+9=9

99 multiplication formula-99 multiplication formula

"Small ninety-nine", that is, the following formula corresponds to "one by one, one by one, two by one, Two two get four ... "1*1=1* 2 = 22 * 2 = 41* 3 = 32 * 3 = 63 * 3 = 91* 4. 5= 10 3*5= 15 4*5=20 5*5=25 1*6=6 2*6= 12 3*6= 18 4*6=24 5*6=30 6*6=36 1*7=7 2*7= 14 3*7=2 1 4*7=28 5*7=35 6*7=42 7*7=49 1*8=8 2*8= 16 3*8=24 4*8=32 5*8=40 6*8=48 7*8=56 8*8=64 1*9=9 2*9= 18 3*9=27 4*9=36 5* 9 = 45 6 * 9 = 54 7 * 9 = 63 8 * 9 = 72 9 * 9 = 8 1 8 Lou's multiplication formula table (multiplication formula table of19 *)1multiplication has:/kloc. kloc-0/*3=3 1*4=4 1*5=5 1*6=6 1*7=7 1*8=8 1*9=9 1* 10= 10 1* 1 / kloc-0/= 1 1 1* 12= 12 1* 13= 13 1* 14= 14 1* 15= / Kloc-0/51*16 =161*17 =171*18 =/kloc. 2=4 2*3=6 2*4=8 2*5= 10 2*6= 12 2*7= 14 2*8= 16 2*9= 18 2* 10=20 2* 1 1=22 2* 12=24 2* 13 = 262 *14 = 282 *15 = 302 *16 = 322 *17 = 342 *18 = 362 * kloc-0/5 3*6= 18 3*7=2 1 3*8=24 3*9=27 3* 10=30 3* 1 1=33 3* 12=36 3* 13=39 3* 14=42 3* / Kloc-0/5 = 45 3 *16 = 48 3 *17 = 513 *18 = 54 3 *19 = 57 The multiplication of 4 times is: 4 * 4 = kloc-0/0=40 4* 1 1=44 4* 12=48 4* 13=52 4* 14=56 4* 15=60 4* 16=64 4* 17=68 4* 18=72 4* 19=76 5 multiplication: 5 * 5 = 255 * 6 = 305 * 7 = 355 * 8 = 405 * 9 = 455 *10 = 505 *1= 55. Kloc-0/5 = 75.5 *16 = 80.5 *17 = 85.5 *18 = 90.5 *19 = 95.6 Multiplications are: 6 * 6 = 36.6 * 7 = 45.6. =66 6* 12=72 6* 13=78 6* 14=84 6* 15=90 6* 16=96 6* 17= 102 6* 18= 108 6* 19= / The multiplication of kloc-0/ 14 7 is: 7 * 7 = 497 * 8 = 567 * 9 = 637 *10 = 707 *1= 777 *12. Kloc-0/5 =1057 *16 =127 *17 =197 *18. 8=64 8*9=72 8* 10=80 8* 1 1=88 8* 12=96 8* 13= 104 8* 14= 1 12 8* 15= 1 208 *16 =1288 *17 =1368 *18 =1448 *19 =/kloc-0. kloc-0/ 1=99 9* 12= 108 9* 13= 1 17 9* 14= 126 9* 15= 135 9* 16= 1 44 9 *17 =153 9 *18 =162 9 *19 =1710. Multiplication is as follows kloc-0/ 1= 1 10 10* 12= 120 10* 13= 130 10* 14= 140 10* 15= 150 10* 16= 160 10* 17= 170 10* 18= 180 10* 19= / The multiplication of kloc-0/90 1 1 is:11*1=121/. kloc-0/* 13= 143 1 1* 14= 154 1 1* 15= 165 1 1* 16= / Kloc-0/7611*17 =1871*18 =198/kloc-0. kloc-0/2* 12= 144 12* 13= 156 12* 14= 168 12* 15= 180 12* / Kloc-0/6 =19212 *17 = 20412 *18 = 21612 */kloc. kloc-0/69 13* 14= 182 13* 15= 195 13* 16=208 13* 17=22 1 13* 18 = 23413 *19 = 24714 *14 =19614. The multiplication of 6 = 22414 *17 = 23814 *18 = 25214 *19 = 26615 is The multiplication of 6 = 24015 *17 = 25515 *18 = 27015 *19 = 28516 is 7 = 27216 *18 = 28816 *19 = 30417 is multiplied by:17 *17 = 20. The multiplication of 9=323 18 is:18 *18 = 32418 *19 = 34219.

When did the multiplication formula appear?

Multiplication formula (also called "Jiujiuge") has been produced in China for a long time. As far back as the Spring and Autumn Period and the Warring States Period, Jiujiuge has been widely used by people. In many works, however, some multiplication formulas have been quoted. The original Jiujiuge started with "9981" and ended with "224". ***36 formulas. The bamboo slips excavated in Han Dynasty and the ancient wooden slips of Jiujiu technique found in Dunhuang all started with "Jiujiu 81". The name of "Jiujiu" is the two words that start with the formula. During the 5th century 5~ 10/0th century, the formula of "Jiujiu" was expanded to "one is the same". The order of Jiujiu songs has become the same as that used in modern times, that is, from "one is the same as one" to "9981". The 45-sentence formula contained in Yuan Zhu Shijie's book "The Enlightenment of Arithmetic" has changed from "11" to "999" and is called the nine-number method. There are two kinds of multiplication formulas used now, one is 45 sentences, which is usually called Xiao Jiujiu; There is also a kind of 8 1 sentence, which is usually called Dajiujiu. According to the book, Dajiujiu was first seen in the book Algorithm Dacheng written by Chen Jie in Qing Dynasty.

What grade is the multiplication table taught in primary school?

I learned the multiplication table in the last semester of Grade Two.

Supplementary content: formula of 99 multiplication

1* 1= 1

1*2=2 2*2=4

1*3=3 2*3=6 3*3=9

1*4=4 2*4=8 3*4= 12 4*4= 16

1*5=5 2*5= 10 3*5= 15 4*5=20 5*5=25

1*6=6 2*6= 12 3*6= 18 4*6=24 5*6=30 6*6=36

1*7=7 2*7= 14 3*7=2 1 4*7=28 5*7=35 6*7=42 7*7=49

1*8=8 2*8= 16 3*8=24 4*8=32 5*8=40 6*8=48 7*8=56 8*8=64

1*9=9 2*9= 18 3*9=27 4*9=36 5*9=45 6*9=54 7*9=63 8*9=72 9*9=8 1

99 times 99 multiplication formula table

Can only find the 99X99 of 19X 19? The multiplication of 1 is:1*1=1* 2 = 21* 3 = 31* 4 = 41* 5. kloc-0/*9=9 1* 10= 10 1* 1 1= 1 1 1* 12= 12 1* 13= / kloc-0/3 1* 14= 14 1* 15= 15 1* 16= 16 1* 17= 17 1* / The multiplication of kloc-0/8 =181*19 =192 is: 2 * 2 = 42 * 3 = 62 * 4 = 82 * 5 =102 * 6. kloc-0/8 2* 10=20 2* 1 1=22 2* 12=24 2* 13=26 2* 14=28 2* 15=30 2* 16=32 2* 17=34 2* / Kloc-0/8=36 2* 19=38 3 times: 3 * 3 = 93 * 4 =123 * 5 =153 * 6 =183 * 7 = 2/Kloc. kloc-0/=33 3* 12=36 3* 13=39 3* 14=42 3* 15=45 3* 16=48 3* 17=5 1 3* 18=54 3* 1 The multiplication of 9=57 4 is: 4 * 4 =164 * 5 = 204 * 6 = 244 * 7 = 284 * 8 = 324 * 9 = 364 *10 = 404 */kloc-0. 4 = 56 4 *15 = 60 4 *16 = 64 4 *17 = 68 4 *18 = 72 4 *19 = 76 5 times. The multiplication is: 5 * 5 = kloc-0/ 1=55 5* 12=60 5* 13=65 5* 14=70 5* 15=75 5* 16=80 5* 17=85 5* 18=90 5* 1 The multiplication of 9=95 6 is: 6 * 6 = 366 * 7 = 426 * 8 = 486 * 9 = 546 *10 = 606 *1= 666 */kloc-0 = 72. Kloc-0/6 = 966 *17 =1026 *18 =1086 *19 =1147 times are multiplied by kloc-0/ 1=77 7* 12=84 7* 13=9 1 7* 14=98 7* 15= 105 7* 16= 1 12 7* 17= / Kloc-0/197 *18 =1267 *19 =1338 times: 8 * 8 = 648 * 9 = 728 */kloc-0. kloc-0/3= 104 8* 14= 1 12 8* 15= 120 8* 16= 128 8* 17= 136 8* 18= / The multiplication of kloc-0/448 *19 =1529 is: 9 * 9 = 819 *10 = 909 *1= 999 *. kloc-0/7 9* 14= 126 9* 15= 135 9* 16= 144 9* 17= 153 9* 18= 162 9* 19= / The multiplication of kloc-0/7 1 10 is:10 *10 =10010 *1=/. 20 10* 13= 130 10* 14= 140 10* 15= 150 10* 16= 160 10* 17 =17010 *18 =18010 *19 =190/kloc-0 kloc-0/= 12 1 1 1* 12= 132 1 1* 13= 143 1 1* 14= / kloc-0/54 1 1* 15= 165 1 1* 16= 176 1 1* 17= 187 1 / The multiplication of kloc-0/*18 =1981*19 = 20912 is:12 */kloc-0. 56 12* 14= 168 12* 15= 180 12* 16= 192 12* 17=204 12* / Kloc-0/8 = 21612 *19 = 22813 *13 =169/. kloc-0/5= 195 13* 16=208 13* 17=22 1 13* 18=234 13* 19=247 1 Multiplication by 4 is:14 *14 =19614 *15 = 210/4 *16 = The multiplication of 8 = 25214 *19 = 26615 is:15 *15 = 225/kloc-5 *16 = 25. The multiplication of 8 = 27015 *19 = 28516 is:16 *16 = 256/kloc-6 *17 = 20. The multiplication of 9=304 17 is:17 *17 = 28917 *18 = 30617 *19 = 306. The multiplication of kloc-0/8 *19 = 34219 is: 19* 19=36 1.

The origin of 99 multiplication table

China used the "99 formula" earlier. Sentences such as "3927", "68418", "48312" and "6636" can be found in books such as Xunzi, Guanzi, Huainanzi and Warring States Policy. It can be seen that as early as the Spring and Autumn Period and the Warring States Period, Jiujiu Multiplication Songs became popular.

During the Spring and Autumn Period and the Warring States Period, not only the decimal system was invented, but also the nine-nine watch was invented. Later, it was introduced to Korea and Japan in the east, spread to India and Persia in the west through the Silk Road, and then became popular all over the world. Decimal system and nine-nine tables are an important contribution of ancient China to world culture. Nowadays, countries around the world seldom use multiplication in Greece and other countries.

In China, the earliest multiplication formula table found at present is one of the more than 30,000 Qin bamboo slips unearthed in Liye ancient city in western Hunan in 2002, which recorded the multiplication formula in detail. Different from today's multiplication formula table, the formula table on Qin bamboo slips doesn't start from "one to one", but from "9981" to "two and a half to one".

Extended data:

Greece and Babylon, ancient western civilizations, also have invented multiplication tables, but they are more complicated than the nine-nine tables. There are more than 1,700 Greek multiplication tables invented by Babylon, and they are not complete enough. Because they worked hard to calculate multiplication and division before the 13th century, people who can divide a large number will be regarded as experts in mathematics.

At the beginning of the 13th century, the oriental calculation method was introduced to Europe through people, and Europeans found its convenience, so they learned this new method. At that time, the topic of multiplying two numbers by the new method was the teaching material of the university at that time.