Use your cubes and the number strip:
1. 2 + 5 = 2. 3 + 6 = 3. 1 + 2 = 4. 8 + 2 = 5. 4 + 5 = 6. 7 + 0 = 7. 9 + 1 = 8. 3 + 4 = 9. 2 + 8 = 10. 5 + 4 =