Sagot :
Bonjour
A = 1/2 - 1/3 - 1/6
A = (1 x 3) / (2 x 3) - (1 x 2) / (3 x 2) - 1/6
A = 3/6 - 2/6 - 1/6
A = 3/6 - 3/6
A = 0
B = 7/4 - 15/4 x 1/5
B = 7/4 - 15/20
B = 7/4 - (5 x 3) / (5 x 4)
B = 7/4 - 3/4
B = 4/4
B = 1
C = (3 - 2/9) : (5/6 - 5/9)
C = [(3 x 9) / (1 x 9) - 2/9] : [(5 x 3) / (6 x 3) - (5 x 2) / (9 x 2)]
C = (27/9 - 2/9) : (15/18 - 10/18)
C = 25/9 : 5/18
C = 25/9 x 18/5
C = 450/45
C = (45 x 10) / (45 x 1)
C = 10.
Réponse :
Explications étape par étape
Bonjour
A = 1/2 - 1/3 - 1/6
A = (1 x 3)/(2 x 3) - (1 x 2)/(3 x 2) - 1/6
A = 3/6 - 2/6 - 1/6
A = (3 - 2 - 1)/6
A = 0
B = 7/4 - 15/4 x 1/5
B = 7/4 - 15/5 x 1/4
B = 7/4 - (3 x 5)/5 x 1/4
B = 7/4 - 3 x 1/4
B = 7/4 - 3/4
B = (7 - 3)/4
B = 4/4
B = 1
C = (3 - 2/9)/(5/6 - 5/9)
C = [(3 x 9)/9 - 2/9] / [(5 x 3)/(6 x 3) - (5 x 2)/(9 x 2)]
C = (27/9 - 2/9) / (15/18 - 10/18)
C = 25/9 / (5/18)
C = 25/9 x 18/5
C = 25/5 x 18/9
C = (5 x 5)/5 x (9 x 2)/9
C = 5 x 2
C = 10