When adding fractions with like denominators, you simply add the numerators. You may need to 'simplify' the answer, which means convert it to an equivalent fraction with smaller numbers, such as 10/40 = 1/4.
3/8 + 3/8 = 6/8 = 3/4 Easy!
7/20 + 1/20 = 8/20 = 4/10 = 2/5 Easy!
For each problem in this problem set you will need to add the fractions and then simplify completely. Strive for accuracy and then strive to increase your speed. Good luck and enjoy the challenge!