8.9乘以99加110乘以0.99简便计算怎么算
问题描述:
8.9乘以99加110乘以0.99简便计算怎么算
答
8.9×99+110×0.99
=8.9×99+1.1×99
=(8.9+1.1)×99
=10×99
=990