# Lesson 13 Solve Problems With Equal Groups

• Let’s multiply some teen numbers.

## Warm-up Estimation Exploration: Multiply Teens

Record an estimate that is:

too low

too high

## Activity 1 Problems with Teen Numbers

Solve each problem. Show your thinking using objects, a drawing, or a diagram.

1. A seller at a farmers market has 7 dozen eggs when they close for the day. How many eggs does the seller have?

2. At the farmers market there’s a space for performers to play music with some chairs for people to sit and listen. There are 5 rows of chairs and each row has 15 chairs. How many chairs are there?

3. A booth at a farmers market has a table top that has lengths of 4 feet and 16 feet. What is the area of the table top?

## Activity 2 Gallery Walk: Problems with Teen Numbers

As you visit the posters with your partner, discuss what is the same and what is different about the thinking shown on each poster.

## Problem 1

There are 4 lunch tables. There are 12 students at each table. How many students are there at the tables? Show your thinking using objects, a drawing, or a diagram.