Doubles

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