1's Addition Mixed

Gap-fill exercise

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!
1. 2+1=
2. 1+9=
3. 1+0=
4. 1+1=
5. 6+1=
6. 1+3=
7. 4+1=
8. 1+5=
9. 7+1=
10. 8+1=