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5.31×8.7+53.1×0.13怎么简算?
人气:346 ℃ 时间:2020-03-29 10:37:37
解答
5.31×8.7+53.1×0.13
=5.31×8.7+5.31×1.3
=5.31×(8.7+1.3)
=5.31×10
=53.1
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