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Math Slice

Math Slice: Greatest Common Divisor (Factor)

For Students 5th - 7th Standards
This resource allows students to practice finding the greatest common factor among 2, 3, or 4 numbers. Students are able to select parameters of how many numbers they will compare, and the range of possible numbers. There are ten...
Activity
National Council of Teachers of Mathematics

The Math Forum: Learning to Factor

For Students 9th - 10th
Math Forum Faq which briefly defines greatest common factor and links to an in-depth investigation of how the GCF is found.
Interactive
Calculator Soup

Calculator Soup: Common Factors Calculator

For Students 9th - 10th Standards
This calculator factors a set of positive integers to find the common factors (common divisors) of those integers. Enter the set of numbers you want to factor separating them with commas.
Website
Ducksters

Ducksters: Kids Math: Simplifying and Reducing Fractions

For Students 3rd - 8th Standards
Understand the steps to do when simplifying and reducing fractions including finding the greatest common factor on this website.
Lesson Plan
Better Lesson

Better Lesson: Prepping for the Exam!

For Teachers 6th Standards
Practicing math problems is a great way to study for a math test!
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Paul Dawkins

Paul's Online Notes: Factoring Polynomials: Practice Problems

For Students 9th - 10th
Practice exercise reviews factoring polynomials including how to factor out the greatest common factor, factoring by grouping, factoring quadratics, and factoring polynomials with degree greater than 2.
Interactive
Visual Fractions

Visual Fractions: Rename in Lowest Terms

For Students 3rd - 8th Standards
Practice finding the lowest term name for a variety of different fractions using a number line.