Lesson 21 Center Day 4
Let’s play games to practice adding and subtracting.
Warm-up Number Talk: Missing Values
Find the missing value mentally.
Activity 1 Introduce Number Puzzles, Within 10
Use your number cards to play the game. Complete a puzzle before moving to the next one. Finish as many as you can.
Activity 2 Centers: Choice Time
Choose a center.
Capture Squares
![Center. Capture Squares.](../../../../../downloads/645fe7b3--CaptureSquares.png)
Math Stories
![Center. Math Stories.](../../../../../downloads/06d9e3f0--MathStories-(1).png)
What’s Behind My Back
![Center. What's Behind My Back.](../../../../../downloads/04de3281--2.1.A-Student-Pages.ConnectingTowers-(1).png)