Réponses

2014-06-03T20:42:14+02:00
Bonsoir

12/2 x 17 = 6 x 17 = 102
7/5 x 25 = 7 x 5 = 35
6/4 x 14 = 6/2 x 7 = 42/2 = 21
2014-06-03T21:11:26+02:00
A) 12/2 = 6 
6*10 = 60 
6*7=42
60+42= 102

b)7/5=1,4
1,4*20 =28
1,4*5 =7
28+7=35

c)6/4=1,5
1,5*10=15
1,5*4=6
15+6=21

*= multiplier !!