Education Technology

# Activities

• ##### Subject Area

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

6-8

60 Minutes

• ##### Device
• TI-73 Explorer™
• ##### Other Materials
This is Activity 2 from the EXPLORATIONS Book:
Discovering Mathematics with the TI-73: Activities for Grades 5 and 6

## Factors Galore A: Common Factors

#### Activity Overview

Students practice simplifying fractions in a game format by dividing the numerator and denominator by the greatest common factor.

#### Before the Activity

• See the attached PDF file for detailed instructions for this activity
• Print pages 5 - 9 from the attached PDF file for your class

#### During the Activity

Distribute the pages to the class.

• Enter an unsimplified fraction
• Predict the grestest common factor of the numerator and denominator
• Use the calculator to verify if the prediction is correct
• Repeat the guessing and verifying process until the fraction is completely simplified
• Understand how the calculator evaluates the predicted value
• Repeat the activity with other 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