bonjour
A = 5/2 + 2/5
A = 25/10 + 4 /10
A = 29/10
B = 6 - 1/4
b = 24/4 - 1/4
B = 23 /4
C = 1/3 : 5 /4
C = 1/3 x 4/5
C = 4 /15
D = 2/7 + 1 /4 x 5/3
d = 2/7 + 5/12
D = 24/84 + 35/84
D = 59/84
