Réponse :
Explications étape par étape
Bonjour
A=-5/8+7/12
A = (-5 x 3)/(8 x 3) + (7 x 2)/(2 x 12)
A = -15/24 + 14/24
A = -1/24
B=-14/12×18/35
B = -(7 x 2)/(6 x 2) x 18/35
B = -7/6 x 18/35
B = -7/35 x 18/6
B = -7/(7 x 5) x (3 x 6)/6
B = -1/5 x 3
B = -3/5
C=1/1-1/5÷6
C = 1/(1 - 1/5)/6
C = 1/(5/5 - 1/5)/6
C = 1/(4/5)/6
C = 1/(4/5 x 1/6)
C = 1/(4/30)
C = 30/4
C = 15/2
D=1/3÷(2-3/7)
D = 1/3 / (14/7 - 3/7)
D = 1/3 / (11/7)
D = 1/3 x 7/11
D = 7/33
