Réponse:

a. 13/9

d. 15/33

b. 11/25

e. 10/8

c. 7/12

f. 6/150

j'espère que c'est ça

Verified answer

Bonjour

a. 5/6 + 8/3 = 5/6 + (8 × 2) / (3 × 2) = 5/6 + 16/6 = (5 + 16) / 6 = 21/6 = (21 / 3) / (6 / 3) = 7/2

b. 4/5 + 7/20 = (4 × 4) / (5 × 4) + 7/20 = 16/20 +7/20 = (16 + 7) / 20 = 23/20

c. 2/3 + 5/9 = (2 × 3) + (3 × 3) +5/9 = 6/9 + 5/9 = (5 + 6) / 9 = 11/9

d. 11/3 - 4/30 = (11 × 10) / (3 × 10) - 4/30 = 110/30 - 4/30 = (110 - 4) / 30 = 106/30 = (106/2) / (30/2) = 53/15

e. 5/2 - 5/6 = (5 × 3) / (2 × 3) - 5/6 = 15/6 - 5/6 = (15 - 5) / 6 = 10 / 6 = (10/2) / (6/2) = 5/3

f. 4/50 - 2/100 = 4/50 - (2/2) / (100/2) = 4/50 - 1/50 = (4 - 1) / 50 = 3/50