问题标题:
在下面算式中添上括号,使等式成立7×0.9+1.2÷0.3-0.2=48.87×0.9+1.2÷0.3-0.2=1477×0.9+1.2÷0.3-0.2=757×0.9+1.2÷0.3-0.2=47.6
问题描述:
在下面算式中添上括号,使等式成立
7×0.9+1.2÷0.3-0.2=48.8
7×0.9+1.2÷0.3-0.2=147
7×0.9+1.2÷0.3-0.2=75
7×0.9+1.2÷0.3-0.2=47.6
黄秀民回答:
7×(0.9+1.2)÷0.3-0.2=48.8
7×(0.9+1.2)÷(0.3-0.2)=147
(7×0.9+1.2)÷(0.3-0.2)=75
7×[(0.9+1.2)÷0.3-0.2)]=47.6
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