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4-3.25/1.3*0.7用简便方法计算
人气:160 ℃ 时间:2019-11-02 05:16:09
解答
4-3.25/1.3*0.7
=4-2.5×1.3/1.3*0.7
=4-2.5×0.7
=4-1.75
=2.25
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