7.7*6.7+6.7*7.6*99简便算法
问题描述:
7.7*6.7+6.7*7.6*99简便算法
答
原式=1*7.6*6.7+7.6*6.7*99
=(1+99)*7.6*6.7
=100*7.6*6.7
=5092