# Lesson 4 Center Day 1

Let’s play games to practice adding and subtracting.

## Warm-up Number Talk: Subtract 2 Digits

Find the value of each expression mentally.

## Activity 1 Introduce Capture Squares: Add within 20

We are going to play a game.

## Activity 2 Introduce Five in a Row: Add within 100 with Composing

We are going to learn a game called Five in a Row. Let’s play a round together.