add or subtract?

Mr. Hancock does 6 push-ups. Ms. F does 15 push-ups. How many more push-ups does Ms. F do? 

Sean has a 12 pack of Mt Dew. He drinks 2 cans and gives one can to Kenny. How many cans left?

Coach Bryant has 15 basketballs. Mr. Gillette gives him 12 more. How many b-balls all together?

Ms. White buys 10 doughnuts. Then she buys 11 more. How many doughnuts did she buy in all?

Mr. B eats 3 pieces of pizza. Ms. F eats 6 pieces. How many pieces of pizza do they eat?

Ms. Franklin has 3 bags of candy. She buys 6 more. How many bags does she have altogether?

Ms. F bakes 24 cookies. The math students eat 10 cookies. How many cookies are left?

Felisha reads 3 books in Sept., 2 in Oct., and 5 in Nov. How many books did she read in all?

Ms. F has 10 pumpkins. She gives 1 to Ms. Lomax & 3 to Ms. White. How many does she have left?

Mr. Truby plays 7 songs. Then he plays 3 more songs. How many songs did he play altogether?