Réponses

2014-02-06T12:25:09+01:00
A: 1/12+3/12 = 4/12 = 1/3
B:  19/7-5/7 = 14/7 = 2
C: 1/2+7/8 = 4/8+7/8 = 11/8
D: 3+1/5 = 15/5+1/5 = 16/5
E: 7/2-3/4 = 14/4-3/4 = 11/4
F: 3/5+7/1-1  = 3/5+35/5-5/5 = 33/5

A = 1/2 = 12/24 
B = 4/6 = 16/24
C = 4/3 = 32/24
D = 3/12 = 6/24
E = 8/24 inchangé