bonjour qui pourrais m'aidez svp mer ci exercice 52 et 56

Bonjour,

52)
A = 8 + 3 x 2
             7
A = 8 + 6
          7
A = 14/7
A = 7 x 2 / 7 x 1
A = 2

B = 106 + 2
            3
B = 108/3
B = 3 x 36 / 3 x 1
B = 36

C = 3 x 4 + 22
             17
C = 12 + 22
            17
C = 34/17
C = 17 x 2 / 17 x 1
C = 17

D =        45
        6 x 4 - 9
D =      45
        24 - 9
D = 45/15
D = 15 x 3 / 15 x 1
D = 3

56)
1) (6 + 7) x 5 = 13 x 5 = 65
2) (6 x 7) + 5 = 42 + 5 = 47
3) 24 - 4/3 = 72/3 - 4/3 = 68/3 
4) 24/4 - 3 = 6 - 3 = 3