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(5.7x1.2+1.2x4.3)×2.5的简便计算。
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2017-12-07 · 知道合伙人教育行家
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(5.7x1.2+1.2x4.3)×2.5的简便计算
=(5.7+4.3)x1.2x2.5
=10x1.2x2.5
=12x2.5
=30
=(5.7+4.3)x1.2x2.5
=10x1.2x2.5
=12x2.5
=30
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