# Lesson 2 Relate Counting to Addition

Let’s add within 10.

## Warm-up Number Talk: 2 or 3 More

Find the value of each expression mentally.

## Activity 1 More Shake and Spill

Priya is playing Shake and Spill.

She spills 7 red counters and 2 yellow counters.

How many counters did she spill in all?

Show your thinking using drawings, numbers, or words.Equation:

Tyler spills 5 red counters and 3 yellow counters.

How many counters did he spill in all?

Show your thinking using drawings, numbers, or words.Equation:

Clare spills 2 red counters and 8 yellow counters.

How many counters did she spill in all?

Show your thinking using drawings, numbers, or words.Equation:

Han spills 3 red counters and 6 yellow counters.

How many counters did he spill in all?

Show your thinking using drawings, numbers, or words.Equation:

## Activity 2 Are They Both Right?

Kiran and Clare are finding the value of

Kiran counted on from 2.

2 + 7 = \boxed{9}

Clare counted on from 7.

7 + 2 = \boxed{9}

How can both methods be correct?

Show your thinking using drawings, numbers, or words.

## Activity 3 Practice Addition Within 10

Find the value of each sum.

## Practice Problem

## Problem 1

Find the value of each sum.