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

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

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