# Dividing Decimals

Help students transition from a visual representation of dividing decimals to using the standard algorithm for dividing decimals by a whole number. Use this lesson on its own or as support for th lesson Diner Division.
This lesson can be used as a pre-lesson for the Diner Division lesson plan.
##### View aligned standards
This lesson can be used as a pre-lesson for the Diner Division lesson plan.

#### Objectives

Students will be able to apply the standard algorithm for dividing decimals by a whole number to solve real-world math problems.

##### Language

Students will be able to describe how to divide decimals by whole numbers using models and strategic pairings.

#### Introduction

(5 minutes)
• Tell students you went grocery shopping yesterday and your total bill was forty-eight dollars and fifty-four cents. Ask them to represent the price in a different way on whiteboards rather than in word form (e.g., \$48.54 or a place value chart with four boxes in the tens place, eight boxes to represent the ones place, five lines to represent the value in the tenths place, and four dots for the value in the hundredths place).
• Allow students to share their ideas in partners. Write their ideas on the board as they discuss them.
• Tell students that your friends want to split the grocery bill three ways. Ask them to turn and talk to their elbow partner about what operation they would use to figure out how much each friend would need to pay. Choose students to share aloud and lead them to decide they need to divide \$48.54 into three different groups to represent the amount that each friend has to pay.
• Write the student-friendly language objective and have students choral read it with you: "I can describe how to divide decimals by whole numbers using models and strategic pairings." Draw images near the vocabulary terms to represent what they mean (e.g., a decimal number above "decimals," grid models above "model," and phrases students may use when they describe a process, like "First, I ________.").