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数学
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1240乘3.8加124乘63减12.4乘10怎么计算
人气:222 ℃ 时间:2019-12-09 21:47:12
解答
1240×3.8+124×63-12.4×10
=124×10×3.8+124×63-124×1
=124×38+124×63-124×1
=124×(38+63-1)
=124×100
=12400
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