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5.6×0.31-0.52怎么简算
人气:193 ℃ 时间:2020-03-23 05:27:30
解答
5.6×0.31-0.52
=5.6×0.3+5.6×0.01-0.52
=1.68+0.056-0.52
=1.736-0.52
=1.216
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