Lesson 7 Subtract Two Digits

• Let’s subtract with two-digit numbers.

Warm-up How Many Do You See: Compose a Ten

How many do you see? How do you see them?

Activity 1 What’s the Difference?

Find the value of each difference. Show your thinking. Use blocks if it helps.

Activity 2 Use Blocks to Take Away

1. Choose a player card. Mix up the other cards and put them face down.
Player name:

2. Represent your starting number with base-ten blocks.
Starting number:

3. Take turns picking a card. Read the card to the group.

4. Listen for your player’s name. Use the blocks to show the change.

6. Write an equation to show the new number.
Equation 1:
Equation 2:
My player now has tens and ones.
Ending number: