Fraction Addition (Like Denominators)

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

1. $\dfrac{1}{2}$ + $\dfrac{1}{2}$= 

2. $\dfrac{10}{15}$ + $\dfrac{3}{15}$= 

3. $\dfrac{9}{10}$ + $\dfrac{2}{10}$= 

4. $\dfrac{1}{12}$ + $\dfrac{10}{12}$=

5. $\dfrac{4}{11}$ + $\dfrac{6}{11}$=

6. $\dfrac{2}{8}$ + $\dfrac{7}{8}$= 

7. $\dfrac{2}{12}$ + $\dfrac{9}{12}$= 

8. $\dfrac{2}{3}$ + $\dfrac{2}{3}$= 

9. $\dfrac{3}{12}$ + $\dfrac{10}{12}$= 

10. $\dfrac{1}{5}$ + $\dfrac{3}{5}$= 

11. $\dfrac{4}{8}$ + $\dfrac{5}{8}$= 

12. $\dfrac{1}{11}$ + $\dfrac{5}{11}$=