Réponse :
Bonjour 2tupac
Explications étape par étape
A = 2/3 +5/3 X 4/7 la multiplication est prioritaire
A = 2/3 +20/21
A = 2/3 X 7/7 +20/21
A = 14/21 +20/21
A = 34/21
B = 7/30 -4/3 : 5/2 la division est prioritaire
B = 7/30 -4/3 X 2/5 la multiplication est prioritaire
B = 7/30 -8/15
B = 7/30 -8/15 X 2/2
B = 7/30 -16/30
B = -9/30 : 3/3 pour simplifier c'est = -3/10
C = (4 - 1/3) + 5/4 le signe devant 5/4 c'est ce que je lis.
C = (4 X 3/3 -1/3) +5/4
C = (12/3 -1/3) +5/4
C = 11/3 +5/4
C = 11/3 X 4/4 +5/4 X 3/3
C = 44/12 +15/12
C = 59/12
D = 7/4 -2 = 7/4 -2 X 4/4 =7/4 -8/4 = -1/4 = -1/4 X 4/17 = -4/ 68 = -1/17
5/4 +3 5/4 +3 X 4/4 5/4 +12/4 17/4
E = 5 -2/5 = 5 X 5/5 -2/5 = 25/5 -2/5 = 23/5 X 5/36 = 115/180 : 5/5 = 25/56
4/5 X 9 36/5 36/5
F = 5/6 +1/3 X 4/8 +7/3
F = 5/6 +4/24 +7/3
F = 5/6 X 4/4 +4/24 +7/3 X 8/8
F = 20/24 +4/24 + 56/24
F = 80/24 = 40/12 = 20/6 = 10/3
