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(0.72*0.4*3.5)/(0.9*0.2*7)简算
人气:230 ℃ 时间:2020-03-25 00:52:01
解答
(0.72*0.4*3.5)/(0.9*0.2*7)
=(0.72÷0.9)×(0.4÷0.2)×(3.5÷7)
=0.8×2×0.5
=0.8×(2×0.5)
=0.8×1
=0.8
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