Réponse :
Bonjour
Explications étape par étape :
Sauf A et B comme indiqué.
C = 7/5+ 7/10 -9/5
C = 7/5 X 2/2 + 7/10 -9/5 X 2/2
C = 14/10 + 7/10 - 18/10
C = 3/10
D = 5 - 23/3
D = 5 X 3/3 - 23/3
D = 15/3 - 23/3
D = -8/3
E = 3/7 -5
E = 3/7 -5 X 7/7
E = 3/7 - 35/7
E = -32/7
F = 2 - 34/11 -6 + 5/22
F = 2 X 22/22 - 34/11 X 2/2 - 6 X 22/22+ 5/22
F = 44/22 - 68/22 - 132/22 + 5/22
F = -151/22
