6.12乘99加6.12和5.9乘101减5.9怎么简便计算

问题描述:

6.12乘99加6.12和5.9乘101减5.9怎么简便计算

6.12乘99加6.12
=6.12*(99+1)
=6.12*100
=612
5.9乘101减5.9
=5.9*(101-1)
=5.9*100
=590