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4.75*3 又5/2-3.4+6.25*3又5/2简便算法
人气:394 ℃ 时间:2020-04-10 17:59:24
解答
4.75×3 又5/2-3.4+6.25×3又5/2
=(4.75+6.25)×3又5/2-3.4
= 11×11/2-3.4
= 121/2-3.4
= 60.5-3.4
= 57.1
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