Numbers 1-20

An exercise by Papadamos Konstantinos

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
Write the answer as in the examples

e.g. 3+2= five
10+7 = seventeen

1. 13+3 =
2. 8+7 =
3. 7+6 =
4. 10+9+ =
5. 10+10 =
6. 14+3 =
7. 9+9 =
8. 12+2 =
9. 6+4 =
10. 8+3=