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数学
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6/7加7/9乘3/14,简便计算
人气:227 ℃ 时间:2020-02-01 11:29:45
解答
6/7+7/9x3/14
=6/7+3/9x7/14
=6/7+1/3x1/2
=6/7+1/6
=43/42
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