Activities

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- Before the Activity Files
- Teacher Notes Guide PDF
- Teacher Notes PDF
Alignment
- Standards Alignment
- Textbook Alignment
Subject Area
- Maths: Middle Grades Math: Number Sense
- Maths: Middle Grades Math: Basic Facts
- Maths: PreAlgebra: Number Sense and Operations
Author

Texas Instruments
Level

6-8
Activity Time

30 Minutes
Device
- TI-73 Explorer™
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Finding the GCF

Activity Overview

Students simplify fractions by dividing the numerator and denominator by the GCF (the greatest common factor). They check their work by using a calculator.

Before the Activity

Set up the calculator as explained in the appendix file

See the attached PDF file for detailed instructions for this activity

Print the pages from the attached PDF file for the class

During the Activity

Distribute the pages to the class.

Follow the Activity procedures:

Without using the calculator, find the greatest common factor for the given fractions

Enter the fraction and use the simplify function

Note the new fraction displayed along with the factor used for simplification of the numerator and denominator

Continue to simplify the fraction further till it can be no longer simplified

Note all the factors used to simplify the fraction, and multiply the factors to get the GCF

Verify the value of the GCF by entering the original fraction, using the simplify function key, and the GCF value to get the simplified fraction

Find the GCF of the other fractions listed

After the Activity

Review student results:

As a class, discuss questions that appeared to be more challenging

Re-teach concepts as necessary

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Before the Activity Files

Alignment

Subject Area

Author

Level

Activity Time

Device