\text{Đáp án + Giải thích các bước giải:}
a) 58(3 1/29 - 2 1/58)
= 58(88/29 - 117/58)
= 58 . 59/59
= 59
b) 75(-2 3/25 + 7 2/75 - 5 4/15)
= 75( -53/25 + 527/75 - 79/15)
= 75 . (- 9/25)
= -27
c) 45(5 4/15 - 4 7/9 - 1 8/45)
= 45(79/15 - 43/9 - 53/45)
= 45 . (-31/15)
= -31
d) (7/12 - 1 1/7 + 5/12 + 6/5) : (-5/3)
= [(7/12 + 5/12) - 8/7 + 6/5] : (-5/3)
= [1 - 8/7 + 6/5] : (-5/3)
= 37/35 : (-5/3)
= -111/175
