Bjrs pouviez vous m'aider mercii calcule et donne le resultat sous la forme d'une fraction la plus simple possible . A = 5 x 2/3 - 1 /3 B= 7/4 - 3/4 x 3/2 C= (5

A = 5 x 2/3 - 1 /3
A = 10/3 - 1/3
A = 9/3
A = 3 x 3 / 3 x 1
A = 3

B= 7/4 - 3/4 x 3/2
B = 7/4 - 9/8
B = 7 x 2 / 4 x 2 - 9/8
B = 14/8 - 9/8
B = 5/8

C= (5/6 + 7/12 ) x 3/5
C = (5 x 2 / 6 x 2 + 7/12) x 3/5
C = (10/12 + 7/12) x 3/5
C = 17/12 x 3/5
C = 51/60

E = (1/3 x 6/5 - 3/10) x 15 /4
E = (6/15 - 3/10) x 15/4
E = (6 x 4 / 15 x 4 - 3 x 6 / 10 x 6) x 15/4
E = (24/60 - 18/60) x 15/4
E = 6/60 x 15/4
E = 90/240
E = 30 x 3 / 30 x 8
E = 3/8

A= 5 × 2÷3 -1÷3
A= 10÷3 -1÷3
A= 9÷3
A= 3÷1
(A= 3)

B= 7÷4 -3÷4 × 3÷2
B= 7÷4 -9÷8
B= 14÷8 -9÷8
B= 5÷8

C= (5÷6 + 7÷12) × 3÷5
C= (10÷12 + 7÷12) × 3÷5
C= 17÷12 × 3÷5
C= 17÷20

E= (1÷3 × 6÷5 -3÷10) × 15÷4
E= (2÷5 -3÷10) × 15÷4
E= (4÷10 -3÷10) × 15÷4
E= 1÷10 × 15÷4
E= 3÷8