简便计算 (1/4-1/8)除以5/12-5/12 【17/12-(3/4-1/6)】除以3/4
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![简便计算 (1/4-1/8)除以5/12-5/12 【17/12-(3/4-1/6)】除以3/4](/uploads/image/z/98716-4-6.jpg?t=%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97+%EF%BC%881%2F4-1%2F8%EF%BC%89%E9%99%A4%E4%BB%A55%2F12-5%2F12+%E3%80%9017%2F12-%EF%BC%883%2F4-1%2F6%EF%BC%89%E3%80%91%E9%99%A4%E4%BB%A53%2F4)
简便计算 (1/4-1/8)除以5/12-5/12 【17/12-(3/4-1/6)】除以3/4
简便计算 (1/4-1/8)除以5/12-5/12 【17/12-(3/4-1/6)】除以3/4
简便计算 (1/4-1/8)除以5/12-5/12 【17/12-(3/4-1/6)】除以3/4
(1/4-1/8)除以5/12-5/12
=(1/4-1/8)*12/5-5/12
=3/5-3/10-5/12
=3/10-5/12
=18-25/60
=-7/60
【17/12-(3/4-1/6)】除以3/4
=【17/12-(3/4-1/6)】*4/3
=17/9-(3/4-1/6)*4/3
=17/9-1+2/9
=10/9
分子分母同时乘以12.