We can rearrange the following problems to make them a little easier:
24 + 9 = 20 + 4 + 9 = Since 24 = 20 + 4, we can rewrite the original problem as shown. ANSWER: 33
37 + 4 = 30 + 7 + 4 = Since 37 = 30 + 7, we can rewrite the original problem as shown. ANSWER: 41