-1/3 . 141/17 - 39/3 . -1/17

Bài 2 :
a)  A = -1/3 . 141/17 - 39/3 . -1/17
b) B = 2/3 + 1/5 . 10/7
c) C = ( 23/41 - 15/82 ) . 41/25
d) D = -3/2 . -7/10 + 1/4 . 7/5 + -1/20