Extra Practice Problems: Unit 2 Test

The boys and girls have their first Math test on Thursday. Here is an extra practice problem that will assist with test preparation. Don't forget, there's also a Practice Test that can be downloaded here. 

Champ has 21 dog cookies. 
Scooter has 5 more cookies than Champ. 
How many cookies do both dogs have altogether?

Here's another one!

Champ has 32 tennis balls.
Scooter has 17 tennis balls. 
How many more tennis balls does Champ have than Scooter?
How can you check your work to make sure you're right? (hint: check your study guide for the answer!)