用简便方法计算下面各题.

问题描述:

用简便方法计算下面各题.
(2-0.92)÷(0.12+0.15)
(2.4+7.2)÷0.24

(2-0.92)÷(0.12+0.15)
=1.08÷0.27
=1.08÷0.09÷3
=21÷3
=7
(2.4+7.2)÷0.24
=2.4÷0.24+7.2÷0.24
=10+30
=40第一题不算简便把!就是这样的,也是简便额,,,。。。。算错了=1.08÷0.3÷0.9=3.6÷0.9=4?。。真的对吗》嗯