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2.4*0.19+0.24*8.1如何简便计算
人气:418 ℃ 时间:2019-12-21 14:49:42
解答
=0.24×10×0.19+0.24×8.1
=0.24×1.9+0.24×8.1
=0.24×(1.9+8.1)
=0.24×10
=2.4
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