58.7*6.8+6.8*40+6.8简便计算
问题描述：
58.7*6.8+6.8*40+6.8简便计算
答
58.7*6.8+6.8*40+6.8
=6.8(58.7+40+1)
=6.8*(59+40+1-0.3)
=6.8*(100-0.3)
=680-2.04
=677.96谢谢啦