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

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

  2. 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

  1. Find the value of . Use the diagram if it is helpful.

    Diagram, square. Partitioned into 10 rows of 10 of the same size squares. No squares shaded.
  2. Jada says that there are 100 hundredths in 1 so is 100. Do you agree with Jada? Show or explain your reasoning.