5.6乘以1.25用简便方法怎么计算
问题描述:
5.6乘以1.25用简便方法怎么计算
答
5.6×1.25
=0.7×8×(1+0.25)
=0.7×(8×1+8×0.25)
=0.7×(8+2)
=0.7×10
=7