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42.5×0.99+0.425如何 简算
人气:145 ℃ 时间:2020-05-06 07:46:02
解答
42.5×0.99+0.425
=42.5×0.99+42.5×0.01
=42.5×(0.99+1)
=42.5×1
=42.5
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