# Lesson 20 More Practice to Represent and Solve

Let’s represent and solve more problems.

## Warm-up Number Talk: Two Steps

Find the value of each expression mentally.

## Activity 1 Info Gap: Introduction

## Activity 2 Info Gap: Bake Sale

Your teacher will give you either a problem card or a data card. Do not show or read your card to your partner.

Pause here so your teacher can review your work.

Ask your teacher for a new set of cards and repeat the activity, trading roles with your partner.

## Practice Problem

## Problem 1

Andre has 245 cards. He bought 7 more packages of cards. How many cards does he have now?

What information do you need to know to answer the question?

Write an expression to represent the situation. Use a letter for the unknown quantity.