小明在计算(x+1.2)x6时把括号看漏了结果小了30.6,真确是

问题描述:

小明在计算(x+1.2)x6时把括号看漏了结果小了30.6,真确是

小明在计算(x+1.2)x6时把括号看漏了结果小了30.6,正确答案是37.92
(x+1.2)×6-(x+1.2×6)=30.6
6x+7.2-x-7.2=30.6
5x=30.6
x=5.12
(x+1.2)x6
=(5.12+1.2)×6
=6.32×6
=37.92