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1250x0.037+0.125x160+12.5x47简便计算
人气:221 ℃ 时间:2020-04-03 08:03:21
解答
不对
应该是1250x0.037+0.125x160+12.5x4.7
=12.5x3.7+12.5x1.6+12.5x4.7
=12.5x(3.7+1.6+4.7)
=12.5x10
=125
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