3's Addition

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