Bonjour,
exercice 26
1)
4*1 =4
4*2=8
4*3 = 12
6*1=6
6*2=12
2)
a= 3/12 +2/12 = 5/12
b= 9/12 + 10/12 = 19/12
c= 21/12 -4/12 = 17/12
d= -33/12 - 14/12 = -47/12
e= 3/12 -2/12 = 1:12
f= 3/12 +10/12 = 13/12
exercice 28
a)
18/63 + 7/63 = 25/63
b)
40/15 - 9/15 =31/15
c)
45/6 - 35/6 = 10/6 = 5/3
