Calculer et donner le sesultat sous forme de fraction irréductible A=5÷6-7÷6×3÷14 B=17+22÷61-9×2÷3

Bonsoir,

A = 5/6 - 7/6 x 3/14
A = 5/6 - 21/84
A = 5 x 14 / 6 x 14 - 21/84
A = 70/84 - 21/84
A = 49/84
A = 7 x 7 / 7 x 12
A = 7/12

B = 17 + 22/61 - 9 x 2/3
B = 17 x 183 / 1 x 183 + 22 x 3 / 61 x 3 - 18/3
B = 3111/183 + 66/183 - 18 x 61 / 3 x 61
B = 3111/183 + 66/183 - 1098/183
B = 3177/183 - 1098/183
B = 2079/183
B = 3 x 693/ 3 x 61
B = 693/61