Education Technology

# Activities

• ##### Subject Area

• Maths: Middle Grades Math: The Number System

6-8

45 Minutes

• ##### Device
• TI-Nspire™ CX/CX II
• TI-Nspire™ CX CAS/CX II CAS
• TI-Nspire™ Navigator™
• TI-Nspire™ Apps for iPad®
• ##### Software

TI-Nspire™
TI-Nspire™ CAS

3.9

## Multiplication and Division of Rational Numbers

#### Activity Overview

This lesson involves using an interactive area model to solve multiplication and division problems with positive decimals and mixed numbers.

#### Objectives

• Students will use an interactive area model to multiply and divide positive decimals and mixed numbers.
• Students will use the distributive and commutative properties to multiply decimals and mixed numbers.
• Students will use the idea of division as an inverse operation of multiplication to divide decimals and mixed numbers.

#### Vocabulary

• factor
• product
• dividend
• divisor
• quotient
• commutative property of multiplication
• distributive property
• inverse

#### About the Lesson

This lesson involves using an interactive area model to solve multiplication and division problems with positive decimals and mixed numbers.
As a result, students will:

• Make connections between the geometric model and mathematical operations.
• Record their steps and observations on their worksheets.
• Randomly generate new numeric expressions.