Using Addition to Solve Subtraction

Using Addition to Solve Subtraction

I can think flexibly about solving problems by using addition or subtraction to find a missing partner.

Justin has 26 sports cards.

• What do you think will happen next?

• 
  

He went to the store and bought more cards.

• Do we know how many cards we bought?

He went to the store and bought more cards.

• Do we know how many cards we bought?

Poll

He went to the store and bought more cards.

Do we know many cards he bought?

• Yes

• No