Math Review Module 1

 $6-2=$  

There are 9 ducks swimming along in a line. There are 2 grown-up ducks and the res are babies. How many of the ducks are babies?

Jennifer says you can use addition to solve subtraction. She says to solve 9-3=__ , all you need to do is add 9+6.

Explain how Jennifer is wrong AND right using words pictures and numbers.

Jesse is confused about this problem:

___=10-8

Be his teacher. Write two addition number sentences that might help him understand how to solve it.

At the park, there are 6 friends playing baseball. Some more friends come. Now there are 10 friends playing.

How many friends come to play with the first 10 friends? Write an addition sentence to show your understanding.