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28.67×67+573.4×0.05+3.2×286.7简便算
人气:492 ℃ 时间:2019-12-19 01:23:52
解答
28.67×67+573.4×0.05+3.2×286.7
=28.67×67+28.67×20×0.05+32×28.67
=28.67×(67+1+32)
=2867
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