Lesson 5 Explore Addition and Subtraction

- Let’s add and subtract.

Warm-up Number Talk: Subtract 1 or 2

Find the value of each expression mentally.

$6 - 1$
$6 - 2$
$8 - 1$
$8 - 2$

Activity 1 Introduce Check it Off: Subtract within 10

We are going to learn a new way to play Check it Off. This time, instead of adding to find each number on the recording sheet, you will subtract.

Activity 2 Centers: Choice Time

Choose a center.

Counting Collections

Center. Counting Collections.

Number Race

Center. Number Race.

Check it Off

Center. Check It Off.

Five in a Row: Addition and Subtraction

Center activity. Five in a row.

Practice Problem

Problem 1

Show 2 ways you could use these cards in the game.

2 groups of dots. First group, 6. Second group, 3.

$-$ $=$

$-$ $=$