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3/4除以5/6+2/3除以2/7 简算
人气:114 ℃ 时间:2020-04-01 02:22:18
解答
3/4÷5/6+2/3÷2/7
=3/4×6/5+2/3×7/2
=9/10+7/3
=(27+70)/30
=97/30
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