Answer: 1) It takes at least 3 minutes to bake 3 cakes; method: the first time: the front side of the first piece, the front side of the second piece (it takes 1 minute); the second time: bake the reverse side of the first piece , take out the second piece and put in the third piece to iron the front side (it takes 1 minute); the third time: take out the first piece; put in the second piece and iron the reverse side and the third piece to iron the reverse side (it takes 1 minute); ( 2) It takes 5 minutes to bake 5 cakes; method: the time required to bake 2 cakes is: 2 minutes, and the time required to bake 3 cakes is 3 minutes, so it takes 5 minutes to bake 5 cakes; (3) 10 cakes It takes 10 minutes to bake a cake, and 100 minutes to bake 100 cakes, so the following rules can be summarized from the above: when the number of cakes is less than 2, the time used is 2 minutes; when the number of cakes is greater than or equal to 2, the time used Equal to the number of cakes, analysis 1) It takes at least 3 minutes to bake 3 cakes; method: the first time: the front of the first sheet, the front of the second sheet (takes 1 minute); the second time: bake the reverse side of the first sheet, take Take out the second piece and put in the third piece to iron the front side at the same time (it takes 1 minute); the third time: take out the first piece; put in the second piece and iron the reverse side and the third piece to iron the reverse side (it takes 1 minute); so always* **Take 3 minutes. (2) It takes 5 minutes to bake 5 cakes; method: the time required to bake 2 cakes is: 2 minutes; the time required to bake 3 cakes is 3 minutes; so it takes: 2 3=5 (minutes ( 3) It takes 10 minutes to bake 10 cakes, and 100 minutes to bake 100 cakes; so the following rules can be summarized from the above: when the number of cakes is less than 2, the time taken is 2 minutes; when the number of cakes is greater than or equal to 2, the time taken is equal to the number of cakes
Analysis: The pancake problem is a simple overall planning problem