Word Problems within 20

Ava has 9 M&M's. She gets 3 more M&M's from her mother. How many M&M's does Ava have now?

Mia read some books on Monday. On Wednesday she read 3 more. She read 9 books in total. How many did she read on Monday?

Sean has 5 dimes. He found some more dimes after he cleaned his room. Now he has 12 dimes. How many dimes did he find?

Madison has 7 toy cars. Caleb has 11 toy cars. How many toy cars do they have in all?

There are 4 boys in Ms.Ty's class and 6 boys in Ms. Fry’s class. How many boys are in both?

Mel saw 2 frogs on a lily pad. Some more frogs hopped on the lily pad. Now there are 12 frogs. How many frogs hopped on?