0.87×2.3+8.7×77简便运算
问题描述:
0.87×2.3+8.7×77简便运算
怎么简便运算那?
答
0.87×2.3+8.7×77
=0.87×2.3+0.87×770
=0.87×(2.3+770)
=0.87×772.3
=671.901