# 10 - 20

#### Reken uit

1. $$7 + \color{red}{11} =$$
2. $$5 + \color{red}{6} =$$
3. $$8 + \color{red}{6} =$$
4. $$8 + \color{red}{10} =$$
5. $$8 + \color{red}{4} =$$
6. $$5 + \color{red}{7} =$$
7. $$6 + \color{red}{14} =$$
8. $$5 + \color{red}{8} =$$
9. $$4 + \color{red}{16} =$$
10. $$5 + \color{red}{15} =$$
11. $$2 + \color{red}{18} =$$
12. $$7 + \color{red}{6} =$$

#### Reken uit

##### Verbetersleutel

1. $$7 + \color{red}{11} = \color{red}{11} + 7 = 18$$
2. $$5 + \color{red}{6} = 6 + \color{green}{5} = 6 + \color{green}{4 + 1} = 11$$
3. $$8 + \color{red}{6} = 8 + \color{red}{2} \color{red}{ + } \color{red}{4} = 14$$
4. $$8 + \color{red}{10} = \color{red}{10} + 8 = 18$$
5. $$8 + \color{red}{4} = 8 + \color{red}{2} \color{red}{ + } \color{red}{2} = 12$$
6. $$5 + \color{red}{7} = 7 + \color{green}{5} = 7 + \color{green}{3 + 2} = 12$$
7. $$6 + \color{red}{14} = \color{red}{14} + 6 = 20$$
8. $$5 + \color{red}{8} = 8 + \color{green}{5} = 8 + \color{green}{2 + 3} = 13$$
9. $$4 + \color{red}{16} = \color{red}{16} + 4 = 20$$
10. $$5 + \color{red}{15} = \color{red}{15} + 5 = 20$$
11. $$2 + \color{red}{18} = \color{red}{18} + 2 = 20$$
12. $$7 + \color{red}{6} = 7 + \color{red}{3} \color{red}{ + } \color{red}{3} = 13$$
Oefeningengenerator vanhoeckes.be/wiskunde 2024-08-09 05:14:05