Đáp án:
`1/2:(-3/4)+2+1/2+2+1/2.(7/8-1/4)=199/48`
Giải thích các bước giải:
`1/2:(-3/4)+2+1/2+2+1/2.(7/8-1/4)`
`=1/2 . (-4/3)+2+1/2+2+1/2. (7/8-2/8)`
`=1/2 .(-4/3)+2+1/2+2+1/2 . 5/8`
`=-2/3+2+1/2+2+5/16`
`=(-2/3+1/2+5/16)+(2+2)`
`=(-2/3+8/16+5/16)+4`
`=(-2/3+13/16)+4`
`=7/48+4`
`=199/48`