Réponses

2014-09-08T07:18:33+02:00
A) 4/3 -1/6 = 8/6 -1/6 = 7/6
b) 11/36 -2/9 = 11/36 -8/36 = 3/36 = 1/12
c) 13/5 -3/10 = 26/10 - 3/10 = 16/10 = 8/5
d) 7/11 -3/22 = 14/22 -3/22 = 11/20 
e) 3/4 +1/4 +2/5 +3/5 = 15/20 + 5/20 8/20 + 12/20 =40/20 = 4/2 = (2)
f) 1/24 +1/8 +1/6 = 1/24 +3/24 +4/24 = 8/24 = 4/12 = 2/6 = 1/3
g) 1/30 +1/15 -1/5= 1/30 +2/30 -6/30 = -3/30 = -1/15