(7/4-7/8-7/12)/(-7/8)+(-8/3)=(要过程)
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![(7/4-7/8-7/12)/(-7/8)+(-8/3)=(要过程)](/uploads/image/z/15228833-41-3.jpg?t=%287%2F4-7%2F8-7%2F12%29%2F%28-7%2F8%29%2B%28-8%2F3%29%3D%EF%BC%88%E8%A6%81%E8%BF%87%E7%A8%8B%EF%BC%89)
(7/4-7/8-7/12)/(-7/8)+(-8/3)=(要过程)
(7/4-7/8-7/12)/(-7/8)+(-8/3)=(要过程)
(7/4-7/8-7/12)/(-7/8)+(-8/3)=(要过程)
(7/4-7/8-7/12)/(-7/8)+(-8/3)=(要过程)
原式=(7/4-7/8-7/12)/(-7/8)+(-8/3)
=((7*6-7*3-7*2)/24)/(-7/8)+(-8/3)
=(7/24)*(-8/7)-8/3
=-8/24-8/3
=-9/3
=-3