Réponse :
Explications étape par étape :
A= 3+7/5
A = (3X5) / 5 + 7/5
A = 15/5 + 7/5
A= 22/5
B = 2/3 - 7/18 + 2/9
B= (2X6)/(3X6) - 7/18 + (2X2) /(2X9)
B = 12/18 - 7/18 + 4/18
B = 9 / 18
B = 1 / 2
C = 1/6 + 3/4 - 7/24
C = (1X4)/(4X6) +(3X6)/ (6X4) - 7/24
C = 4/24 + 18/24 - 7/24
C = 15/24
C = (3X5) (3X8)
C = 5 / 8
D= 4/3 + 4/6 - 2
D = (4X2) /(2X3) + 4/6 - (2X6) / 6
D = 8/6 +4/6 -12/6
D= 0