Education Technology

# Activities

• ##### Subject Area

• Maths: PreAlgebra: Number Sense and Operations
• Maths: Middle Grades Math: Number Sense

6-8

60 Minutes

• ##### Device
• TI-73 Explorer™
• ##### Other Materials
This is Activity 3 from the EXPLORATIONS Book:
Discovering Mathematics with the TI-73: Activities for Grades 5 and 6

## Factors Galore B: Get the Low Down

#### Activity Overview

In this activity, students practice simplifying fractions in a game format by dividing the numerator and denominator by the greatest common factor.

#### Before the Activity

• Set up the calculator as explained in the activity
• See the attached PDF file for detailed instructions for this activity
• Print pages 11 - 14 from the attached PDF file for your class
• #### During the Activity

Distribute the pages to the class.

• Enter a fraction and recognize whether it is in its simplest form
• Predict the greatest common factor of the numerator and denominator of a fraction and record it
• Use the calculator to check the prediction
• Earn points for a correct prediction
• If the prediction is incorrect, guess again and verify using the calculator
• Repeat the activity for different fractions
• #### After the Activity

Students complete the Student Activity sheet.

Review student results:

• As a class, discuss questions that appeared to be more challenging
• Re-teach concepts as necessary