10 - 20

Hoofdmenu Eentje per keer  🖨

Reken uit

1. \(6 + \color{red}{9} = \)
2. \(7 + \color{red}{10} = \)
3. \(5 + \color{red}{8} = \)
4. \(9 + \color{red}{11} = \)
5. \(4 + \color{red}{8} = \)
6. \(2 + \color{red}{11} = \)
7. \(3 + \color{red}{14} = \)
8. \(6 + \color{red}{11} = \)
9. \(4 + \color{red}{13} = \)
10. \(2 + \color{red}{12} = \)
11. \(7 + \color{red}{8} = \)
12. \(6 + \color{red}{7} = \)

---

Reken uit

Verbetersleutel

1. \(6 + \color{red}{9} = 9 + \color{green}{6} = 9 + \color{green}{1 + 5} = 15\)
2. \(7 + \color{red}{10} = \color{red}{10} + 7 = 17\)
3. \(5 + \color{red}{8} = 8 + \color{green}{5} = 8 + \color{green}{2 + 3} = 13\)
4. \(9 + \color{red}{11} = \color{red}{11} + 9 = 20\)
5. \(4 + \color{red}{8} = 8 + \color{green}{4} = 8 + \color{green}{2 + 2} = 12\)
6. \(2 + \color{red}{11} = \color{red}{11} + 2 = 13\)
7. \(3 + \color{red}{14} = \color{red}{14} + 3 = 17\)
8. \(6 + \color{red}{11} = \color{red}{11} + 6 = 17\)
9. \(4 + \color{red}{13} = \color{red}{13} + 4 = 17\)
10. \(2 + \color{red}{12} = \color{red}{12} + 2 = 14\)
11. \(7 + \color{red}{8} = 8 + \color{green}{7} = 8 + \color{green}{2 + 5} = 15\)
12. \(6 + \color{red}{7} = 7 + \color{green}{6} = 7 + \color{green}{3 + 3} = 13\)