Lesson 23 Center Day 4

- Let’s play games about tens and ones.

Warm-up True or False: Tens and Ones

Decide if each statement is true or false.
Be prepared to explain your reasoning.

$92 = 90 + 2$
$90 + 2 > 80 + 12$
$20 + 13 < 30 + 13$

Activity 1 Introduce Mystery Number: Two-digit Numbers

We are going to learn a new center called Mystery Number.

Activity 2 Centers: Choice Time

Choose a center.

Mystery Number

Center activity. Mystery Number.

Get Your Numbers in Order

Center activity. Get Your Numbers In Order.

Greatest of Them All

Center activity. Greatest of Them All.