# Lesson 10 Center Day 2

Let’s play games to practice adding and subtracting.

## Warm-up Notice and Wonder: Compare the Representations

What do you notice? What do you wonder?

A.

B.

## Activity 1 Introduce Target Numbers: Subtract Two-digit Numbers

We are going to learn a new way to play Target Numbers. You and your partner will start with 100 and race to see who can reach a number less than 10 first.

## Activity 2 Centers: Choice Time

Choose a center.

Target Numbers

Capture Squares

Five in a Row