Verified answer

bonjour,

A = 5/7 + 3/14 = 10/14 + 3/14 = 13/14

B = 5 + 2/3 = 15/3 + 2/3 = 17/3

C = 5/6 - 3/10 = 25/30 - 9/30 = 16/30 = 8/15

D = 10/3 x 6/15 =  10 x 2/15 = 20/15 = 4/3

E = 60/7 : 4/21 = 60/7 x 21/4 = 60 x 21 / 7 x 4 = 15 x 4 x 7 x 3 / 7 x 4 = 45

F = 16/3 - 10/3 x 7/15 = 16/3 - 70/45 = 16/3 - 14/9 = 48/9 - 14/9 = 34/9

il peut avoir une erreur de frappe ou de calcul.. à revérifier..

:)