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4/15+3/14÷1/6+5/7
[7/12-(3/4÷9)]×5/6
人气:399 ℃ 时间:2020-10-02 04:38:39
解答
4/15+3/14÷1/6+5/7
=4/15+9/7+5/7
=4/15+2
=2又4/15
[7/12-(3/4÷9)]×5/6
=(7/12-1/12)×5/6
=1/2×5/6
=5/12
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