The document contains 20 lessons with math word problems. It provides the following information:
- The shelter rescued 27 kittens in June, 11 in July, and 40 in August, for a total of 27 + 11 + 40 = 78 kittens rescued over 3 months.
- If 64 of the kittens found homes, then 78 - 64 = 14 kittens still needed homes.
- Max had 42 marbles after adding 20, so he must have had 42 - 20 = 22 marbles before noon.