Calcule et donne le résultat le plus simplifié possible : A=2/3-7/3×8/21 , B = (3/4-5/6)×3/2 , C = 11÷(2/3-5/2) , D = 3/7 - 15/7 ÷ 5/24 , E = (11/7-2/5)×24/7 , F = 25/15×(1/18+1/24)

Bonjour,

A = 2/3 -7/3 X 8/21                  

A = 2/3 -56/63

A = 42/63 -56/63

A= -14/23

B = (3/4 -5/6) X 3/2

B = (18/24 -20/24) X 3/2

B = -2/24 X 3/2

B = -6/48

B = -3/24

B = -1/8

C = 11 : (2/3 -5/2)

C = 11 : ( 4/6 -15/6)

C = 11 : -11/6 = 11 X 6/-11

C = -66/11

C = -6

D = 3/7 -15/7 : 5/24

D = 3/7 -15/7 X 24/5

D = 3/7  -360/35

D = 15/35 -360/35

D = -345/35

D = -69/7

E = ( 11/7 -2/5) X 24/7

E = (55/35 -14/35) X 24/7

E = 41/35 X 24/7

E = 984/245

F = 25/15 X (1/18 +1/24)

F = 25/15 X (24/432 + 18/432)

F = 25/15 X 42/432

F = 1050/6480

F = 105/648

F = 35/216

Voilà Bon Courage :))