j arrive pas aider moi a calculer en respectant les priorités et donner le resultat simplifier -A= 5/9-2/9*18/6+5/6 B= 7/15-3/25:9/35 /= fraction

bonjour

a = 5/9 - 2/9 x 18/6 + 5/6
a = 5/9 - 2/9 x 3 + 5/6
a = 5/9 - 6/9 + 5/6
a = 30/54 - 36/54 + 45/54 = 75/54 - 36/54 = 39/54 = 3/18

b = 7/15 - 3/25 : 9/35
b = 7/15 - 3/25 x 35/9
b = 7/15 - 105/225
b = 105/225 - 105/225 = 0

A = 5/9 - 2/9 * 18/6 + 5/6
A = 5/9 - 36/54 + 5/6
A = 5 x 6 / 9 x 6 - 36/54 + 5 x 9 / 6 x 9
A = 30/54 - 36/54 + 45/54
A = 39/54
A = 3 x 13 / 3 x 18
A = 13/18

B = 7/15 - 3/25 : 9/35
B = 7/15 - 3/25 x 35/9
B = 7/15 - 105/225
B = 7 x 15 / 15 x 15 - 105/225
B = 105/225 - 105/225
B = 0