Fraction Addition (Unlike Denominators, No Mixed Numbers)

Find the sum. Simplify all answers completely. Change improper fractions to mixed numbers. 

1. $\dfrac{5}{77}+\dfrac{9}{11}=$

2. $\dfrac{11}{34}+\dfrac{3}{17}=$

3. $\dfrac{3}{44}+\dfrac{3}{4}=$

4. $\dfrac{13}{14}+\dfrac{6}{42}=$

5. $\dfrac{3}{15}+\dfrac{5}{9}=$

6. $\dfrac{5}{9}+\dfrac{3}{4}=$

7. $\dfrac{1}{10}+\dfrac{5}{22}=$

8. $\dfrac{9}{14}+\dfrac{13}{28}=$

9. $\dfrac{19}{80}+\dfrac{18}{40}=$

10. $\dfrac{7}{11}+\dfrac{2}{77}=$

11. $\dfrac{5}{10}+\dfrac{4}{11}=$

12. $\dfrac{3}{7}+\dfrac{6}{8}=$