Bonjour est-ce que vous pouviez me résoudre se probléme merci: A=8/3-5/3÷20/21 B=4/5×5/6+6/3

A = 8/3 - 5/3 ÷ 20/21
A = 8/3 - 5/3 x 21/20
A = 8/3 - 105/60
A = 8 x 20 / 3 x 20 - 105/60
A = 160/60 - 105/60
A = 55/60
A = 5 x 11 / 5 x 12
A = 11/12

B = 4/5 × 5/6 + 6/3
B = 20/30 + 6/3
B = 20/30 + 6 x 10 / 3 x 10
B = 20/30 + 60/30
B = 80/30
B = 10 x 8 / 10 x 3
B = 8/3