8.9*1.1+15.7*8.9+6.8*1.1怎么用简便算法解答
问题描述:
8.9*1.1+15.7*8.9+6.8*1.1怎么用简便算法解答
答
8.9×1.1+15.7×8.9+6.8×1.1
解原式= (8.9+6.8)×1.1+15.7×8.9
= 15.7×1.1+15.7×8.9
= 15.7×(1.1+8.9)
= 15.7×10
=157