# Lesson 4 Multiplication Practice

Let’s practice multiplication.

## Warm-up Number Talk: Factors Over Ten

Find the value of each expression mentally.

## Activity 1 Card Sort: Multiplication

Take turns sorting the multiplication expressions into one of these groups:

know it right away

can find it quickly

don’t know it yet

Multiplication expressions I’m going to practice:

## Activity 2 Introduce Find the Number, Factors

We are going to play a game called Find the Number.

## Practice Problem

## Problem 1

Calculate the area of each rectangle.

How did you use multiplication facts to calculate the areas?