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数学
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3又8分之1乘以7.4减去3又8分之1加上3.6乘以3点125简便方法
人气:144 ℃ 时间:2020-01-30 05:06:50
解答
=3又8分之1乘以7.4-3又8分之1乘以1 +3又8分之1乘以3.6
=3又8分之1乘以(7.4-1+3.6)
=3又8分之1乘以10
=31.25
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