# Dissecting Decimals

Challenge students to think about decimals while identifying numbers to the hundredths and thousandths. They'll discuss decimal attributes too. Use this lesson on its own or as support to the lesson Dividing Decimals: Estimation.
This lesson can be used as a pre-lesson for the Dividing Decimals: Estimation lesson plan.
##### View aligned standards
This lesson can be used as a pre-lesson for the Dividing Decimals: Estimation lesson plan.

#### Objectives

Students will be able to round a decimal to a whole number to estimate a quotient.

##### Language

Students will be able to create decimal numbers closer to a given decimal number using number lines and peer discussions.

#### Introduction

(3 minutes)
• Post a number line partitioned into tenths so that the hundredths are the smaller dashed lines, or use a ruler and display it with a document camera.
• Ask students to think about what they are seeing and then try to make a guess about the day's lesson topic. Create a word web with all the ideas they have when they look at the number line (e.g., ruler, decimals, measuring, calculations, etc.).
• Confirm correct answers after all ideas are shared and then tell students that today they'll use number lines to find decimal numbers closer to the given decimal numbers.

### Expressions and Equations

2 games
5 online exercises
5 printable worksheets