(-1/4)-(+5/8)-(0.075)+(+3/16)
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![(-1/4)-(+5/8)-(0.075)+(+3/16)](/uploads/image/z/58110-6-0.jpg?t=%28-1%2F4%29-%28%2B5%2F8%29-%280.075%29%2B%28%2B3%2F16%29)
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(-1/4)-(+5/8)-(0.075)+(+3/16)
(-1/4)-(+5/8)-(0.075)+(+3/16)
(-1/4)-(+5/8)-(0.075)+(+3/16)
原式=-2/8-5/8-3/40+3/16
=-7/8-3/40+3/16
=-19/20+3/16
=-61/80
解(-1/4)-(+5/8)-(0.075)+(+3/16)
=-1/4-5/8-0.075+3/16
=-1/4-5/8-75/1000+3/16
=-1/4-5/8-15/200+3/16
=-1/4-5/8-3/40+3/16
=-10/40-25/40-3/40+3/16
=-38/40+3/16
=-19/20+3/16
=-76/80+15/80
=-61/80