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简算:7/15×3/8+1/15×7/16+7/2÷15
人气:470 ℃ 时间:2020-03-27 17:02:26
解答
7/15×3/8+1/15×7/16+7/2÷15
=7/15×3/8+7/15×1/16+7/15×1/2
=7/15×(3/8+1/16+1/2)
=7/15×15/16
=7/16
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