basis:
8. a 42 b 84
9. a 1% b 1; 18% 2; 20% 3; 13%
10. a €4,25 b 2,5kg
11. a €12,- b €96,-
12. 330 13. a €245,- b €455,-
14. a €8,- b €36,-
15. a meer b 40%
16. a 100, 10, 30 b 30%
17. a a; 100, 20, 40 b; 100, 10, 40
b eigen antwoord c 40%
18. a 20% b 15%
19. B 20. Appelmoes 30%; kauwgom 20%; frisdrank 15% chips 25% 21. 20%
plus:
1. a - b 22,5% c 84
2. A €331,50 B €336,- winkel a is goedkoper
3. a €492,80 b €527,-
4. a 80% b en c €2,25 d €2,65
5. a en b 87,5%
6. a 50% b 25% c 33,3% d 20% e 90% f 12,5%
7. a 25% b 20%