Bonsoir,

A = 5/11 = 5/121

B = 4/3 x 3 588 = 4 784

C =

1) 2/3 x 333 = 222 et 222 x 2 = 444

2) 19/59 = 57/177

3) 5/7 = 56/2 + 1/2 = 28 + 1/2  ; 15 x 1/3 = 15/3 = 5

4) 3/47 = 9/141

   1   2   3   4

A ⊕ 1    2   1

B  4  7   8  4

C  4  7  ⊕  1

D  4 ⊕  5 ⊕