10 - 20

Hoofdmenu Eentje per keer  🖨

Reken uit

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

---

Reken uit

Verbetersleutel

1. \(4 + \color{red}{13} = \color{red}{13} + 4 = 17\)
2. \(6 + \color{red}{13} = \color{red}{13} + 6 = 19\)
3. \(8 + \color{red}{5} = 8 + \color{red}{2} \color{red}{ + } \color{red}{3} = 13\)
4. \(9 + \color{red}{9} = 9 + \color{red}{1} \color{red}{ + } \color{red}{8} = 18\)
5. \(8 + \color{red}{11} = \color{red}{11} + 8 = 19\)
6. \(3 + \color{red}{14} = \color{red}{14} + 3 = 17\)
7. \(7 + \color{red}{11} = \color{red}{11} + 7 = 18\)
8. \(5 + \color{red}{13} = \color{red}{13} + 5 = 18\)
9. \(7 + \color{red}{9} = 9 + \color{green}{7} = 9 + \color{green}{1 + 6} = 16\)
10. \(4 + \color{red}{15} = \color{red}{15} + 4 = 19\)
11. \(6 + \color{red}{5} = 6 + \color{red}{4} \color{red}{ + } \color{red}{1} = 11\)
12. \(3 + \color{red}{13} = \color{red}{13} + 3 = 16\)