2. 2 5 + 1 4 = 3. 1 7 + 4 8 = 4. 2 5 + 7 13 = 5. 1 2 + 1 3 = 6. 8 10 + 2 15 = 7. 2 4 + 2 6 = 8. 5 10 + 2 12 = 9. 1 4 + 1 3 = 10. 1 5 + 3 5 =