学习了乘法,我们可以把加数相同的加法算式改写成乘法算式,再利用乘法口诀口算出加法的和。根据这一原理,我们还可以简便计算类似的题目。例题:(1)5+5+5+5+6(2)6+6+6+6+5+5+5(3)7+7+7+7+7-5(4)6+6+6+6-4-4-4【分析与解】这四道题中,相同加数的“连加部分”可以用乘法算,相同 Learning multiplication, we can rewrite the addition of the same number of additions as a multiplication formula, and then use the multiplication formula to calculate the sum of addition. Based on this principle, we can easily calculate similar topics. Example: (1) 5 + 5 + 5 + 5 + 6 (2) 6 + 6 + 6 + 6 + 5 + 5 + 5 (3) 7 + 7 + 7 + 7 + 7-5 (4) 6 + 6 + 6 + 6-4-4-4 [Analysis and Settlement] Of these four questions, the same “plus and minus part” can be calculated by multiplication, the same