basis:
7. a groen 6 stukken rood 4 stukken
b 6 c 6/16 d 4 4/16
8. a rood: 15 geel: 18 b meer
9. a 7/12 b 5/12
10. a 1/2 b meer c 1/6
11. a 1/6 b 7/12 c 10 stukjes
12. 3/10
13. a 13/20 b A
14. 8 stukjes
15. Johan
Plus: 1.4
1. a 6 b 6 van de 8 c 3/4
2. a 2/9 b 2/3 c 3/13 d 1/5
3. a 2/5 b 2/3 c 1/4 d 1/3
4. a 1/2 b 5/36 c 26/33 d 7/40
5. a 6 5/8 b 1 11/206
6. a 1 2/5 b 9 1/3 c 3 1/13 d 10 5/12
7. a 1 1/7 b 2 5/9 c 5 1/16 d 11 19/30
8. 2 23/40
9. a 2 2/3 b 1 11/24
10. a 3/4 b 3 2/3 c 3/4 d 17/18
11. 1/6, 2 1/3, 1 2/5, 5 1/5, 2 7/10, - 21/40, 1 1/2