Lesson 4 More Work with 1 and 2

- Let’s subtract 1 or 2.

Warm-up Number Talk: Add 1 or 2

Student thinking.

Find the value of each expression mentally.

$6 + 1$
$6 + 2$
$8 + 1$
$8 + 2$

Activity 1 Introduce Five in a Row: Addition and Subtraction, Subtract 1 or 2

We are going to learn a new way to play, Five in a Row.

Activity 2 Centers: Choice Time

Choose a center.

Counting Collections

Number Race

Center. Counting Collections.

Center. Number Race.

Check it Off

Five in a Row: Addition and Subtraction

Center. Check It Off.

Center activity. Five in a row.

Practice Problem

Problem 1

Find the value of each difference.

$10 - 1$
$10 - 2$
$5 - 2$
$6 - 1$
$8 - 2$