add and subtrct fraction and mixed fractions with and without regrouping. 1. 12 14/20 + 2/20 = 2. 18 1/3 + 1/4 = 3. 8 2/3 + 15 1/5 = 4. 5/8 + 36 = 5. 13 3/10 + 29 2/5 subtract the following fractions 6. 7/15 - 1/5 = 7. 6/12 - 2/24 = 8. 5/8 - 1/3 = 9. 6/7 - 1/2 = 10. 1/5 - 1/1​