LENJUARIO28GO LENJUARIO28GO Math Answered 11. Add the following fractions and simplify if needed.5. 1/4 + 2/4 =6. 5 4/7 + 4 2/7 =III. Subtract the following fractions and simplify if need7. 3/5 - 2/58. 9/12 - 3/12 =