Bonjour
Simplifier les fractions :
9/20 + -2/5 -1/3
= (9 x 3) / (20 x 3) - (2 x 12) / (5 x 12) - (1 x 20) / (3 x 20)
= 27/60 - 24/60 - 20/60
= - 17/60
5 -2/8 + 1/2
= (5 x 8) / (1 x 8) - 2/8 + (1 x 4) / (2 x 4)
= 40/8 - 2/8 + 4/8
= 42/8
= (2 x 21) / (2 x 4)
= 21/4
25/169 / 125/-26
= 25/169 x (- 26/125)
= - 650/21 125
= (325 x - 2) / (325 x 65)
= - 2/65
-6/51 / 18/-17
= - 6/51 x (- 17/18)
= 102/918
= (102 x 1) / (102 x 9)
= 1/9.
