3.4乘6.7加3.3乘6.6的能否简便计算
问题描述:
3.4乘6.7加3.3乘6.6的能否简便计算
答
3.4*6.7+3.3*6.6
=(10-6.6)*6.7+3.3*6.6
=67-3.4*6.6
=67-22.44
=44.56