Đáp án:
Mình làm từ ý $b/ → l/$ nhé
$b/$ `5 2/7 . 8/11 + 5 2/7 . 5/11 - 5 2/7 . 2/11`
`= 5 2/7 . (8/11 + 5/11 - 2/11)`
`= 37/7 . 1`
`= 37/7`
$e/$ `(8 5/11 + 3 5/8) - 3 5/11`
`= 8 5/11 + 3 5/8 - 3 5/11`
`= (8 5/11 - 3 5/11) + 3 5/8`
`= 5 + 29/8`
`= 69/8`
$h/$ `(-1/5 + 3/7) : 2/11 + (-4/5 + 4/7) : 2/11`
`= (-1/5 + 3/7) . 11/2 + (-4/5 + 4/7) . 11/2`
`= 11/2 . [-1/5 + 3/7 - 4/5 + 4/7]`
`= 11/2 . [(-1/5 - 4/5) + (4/7 + 4/7)]`
`= 11/2 . [-1 + 1]`
`= 11/2 . 0`
`= 0`
$l/$ `(-2/3) . 3/11 - (-16/9) . 3/11`
`= 3/11 . [(-2/3) - (-16/9)]`
`= 3/11 . 10/9`
`= 10/33`