Pour demain (20 POINTS) merci d'avance

19)
a) 12/16 = 4 x 3 / 4 x 4 = 3/4
b) 32/20 = 4 x 8 / 4 x 5 = 8/5
c) 15/10 = 5 x 3 / 5 x 2 = 3/2
d) 80/30 = 10 x 8 / 10 x 3 = 8/3
e) 36/20 = 4 x 9 / 4 x 5 = 9/5
f) 27/45 = 9 x 3 / 9 x 5 = 3/5
g) 14/49 = 7 x 2 / 7 x 7 = 2/7
h) 35/21 = 7 x 5 / 7 x 3 = 5/3

22)
a) 14/49 =  7 x 2 / 7 x 7 = 2/7
b) 36/15 = 3 x 12 / 3 x 5 = 12/5
c) 18/81 = 9 x 2 / 9 x 9 = 2/9
d) 42/24 =  6 x 7 / 6 x 4 = 7/4
e) 35/25 =  5 x 7 / 5 x 5 = 7/5
f) 12/21 =  3 x 4 / 3 x 7 = 4/7
g) 45/20 = 5 x 9 / 5 x 4 = 9/4
h) 63/49 = 7 x 9 / 7 x 7 = 9/7