括号六分之五加八分之七减十二分之五反括号除以二十四分之一用简便方法计算

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(5/圆败巧6+7/8-5/12)÷1/24
=(5/6+7/橘键8-5/12)×24
=5/枯扰6×24+7/8×24-5/12×24
=20+21-10
=31

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