At the schools book fair Sam bought 13 adventure books and 17 mystery books. If 15 of the books were used, how many new books did he buy?

Olivia had 52 dollars. For her birthday she got 30 more dollars but spent 64 on a new doll. How much money does she have now

Emily was playing a game. In the first round she scored 26 points. The second round she scored 18 points. In the last round she lost 29 points. How many points did she have at the end of the game?

Jennifer is reading a book with 99 pages. She read 37 pages on Monday. Then she read 42 pages on Tuesday. How many pages does she still have to read?

Sebastian has 3 tubs of Legos. The first tub has 38 red Legos. The second tub has 45 blue Legos. The third tub has 6 yellow Legos. How many Legos are in all the tubs combined?