5.6×12.5和0.58×9＋0.58这两题怎么简便计算啊!
问题描述：
5.6×12.5和0.58×9＋0.58这两题怎么简便计算啊!
答
5.6x12.5
=0.7x8x12.5
=0.7x100
=70
0.58x9+0.58
=0.58x(9+1)
=0.58x10
=5.8