# Lesson 22 Divide Whole Numbers by 0.1 and 0.01

Let’s divide whole numbers by one tenth and one hundredth.

## Warm-up Number Talk: Remember Division of Unit Fractions

Find the value of each expression mentally.

## Activity 1 Patterns in Dividing by Decimal Units

## Problem 1

Find the value of each expression. Explain or show your reasoning. Use a diagram if it is helpful.

## Problem 2

What patterns do you notice?

## Activity 2 Divide Whole Numbers by Decimals

Describe how you can find the value of any whole number divided by 0.1. Use a diagram if it is helpful.

Describe how you can find the value of any whole number divided by 0.01. Use a diagram if it is helpful.

## Practice Problem

## Problem 1

Find the value of

. Use the diagram if it is helpful. Jada says that there are 100 hundredths in 1 so

is 100. Do you agree with Jada? Show or explain your reasoning.