a) 11/24-5/41+13/24+0,5-36/41 b)-12 / (3/4-5/6)^2 c)7/27*[(-8/6)-45/18]

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1. Đáp án+Giải thích các bước giải:

   `a,11/24-5/41+13/24+0,5-36/41`

   `=11/24+13/24-5/41-36/41+0,5`

   `=1-1+0,5`

   `=0,5`

   `b,-12/(3/4-5/6)^2`

   `=-12/(-1/12)^2`

   `=-12/(1/144)`

   `=-1728`

   `c,7/27×(-8/6-45/18)`

   `=7/27×(-4/3-5/2)`

   `=7/27×(-23)/6`

   `=-161/162`

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