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3.52-0.48x1.2用简便方法计算
人气:408 ℃ 时间:2020-01-29 13:35:48
解答
3.52-0.48x1.2
=3.52-0.48x1-0.48x0.2
=3.52-0.48-0.096
=3.04-0.096
=3.04-0.1+0.04
=2.94+0.04
=2.944
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