Question

计算7/10×9 7/10应该。运用什么运算定律?

Answer 1

7/10×9+7/10
=7/10×(9+1)
=7/10×10
=7
运用了乘法的分配律

Answer 2

First calculate maturity, then add and subtract, this word should be one 这个是把那个公子提出来 7/10啊 乘以1×9啊