0.75+0.75乘16.3+0.75乘2.7的简便算法0.75+0.75乘16.3+0.75乘2.7的简便算法 快

问题描述:

0.75+0.75乘16.3+0.75乘2.7的简便算法
0.75+0.75乘16.3+0.75乘2.7的简便算法 快

0.75乘(1+16.3+2.7)=15

0.75 + 0.75×16.3 + 0.75×2.7
= 0.75×(1 + 16.3 + 2.7)
= 0.75×20
= 15

0.75+0.75乘16.3+0.75乘2.7
=0.75×1+0.75×16.3+0.75×2.7
=0.75×(1+16.3+2.7)
=0.75×20
=15