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?

$66 - 28$
$66 = 50 + 16$
$16 - 8 = 8$
$50 - 20 = 30$
$30 + 8 = 38$
$66 - 28 = 38$

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