bonsoir je besoin d’aide svp ​

Bonjour

1)

a. 45/14 x 49/60 = 2 205/840 = (105 x 21) / (105 x 8) = 21/8

b. 5/3 x 4/5 = 20/15 = (5 x 4) / (5 x 3) = 4/3

c. 45/26 x 65/72 = 2 925/1 872 = (117 x 25) / (117 x 16) = 25/16

d. 2 x 9/6 = 18/6 = (6 x 3) / (6 x 1) = 3

e. 7/6 x 6/7 = 42/42 = 1

f. 25 x 11/50 = 275/50 = (25 x 11) / (25 x 2) = 11/2.

2)

a. 1/3 x 1/2 = 1/6

b. 1/3 x 3 = 3/3 = 1

c. 1/3 x 1/2 = 1/6

d. 2 x 1/3 = 2/3.