{-60}*{四分之三+六分之五减十五分之十一减十二分支七}
=-60x{3/4+5/6-11/15-7/12}
=-60x3/4-60x5/6+60x11/15+60x7/12
=-45-50+44+35
=-16
{-60} / {四分之三+六分之五-十五分之十一-十二分之七}
=-60/{3/4+5/6-11/15-7/12}
=-60/{(3/4-7/12+5/6)-11/15)}
=-60/{(10/12)-11/15)}
=-60/{50/60-44/60}
=-60x60/6
=-600
(-2)的2012次幂+(-2)的2013次幂怎么算的讲解
-60*()=-16
-60/()= -225
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