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6th Grade GCF & LCM Worksheets

6th Grade GCF & LCM: find greatest common factors and least common multiples and factor sums. Every worksheet is free, prints as a PDF with an answer key, and can be assigned online. The ones teachers open most are first.

← All 6th grade topics 6.NS.4

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6th Grade GCF & LCM Worksheets - Identifying Greatest Common Factor (With Help) worksheet

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Identifying Greatest Common Factor (With Help)

6ns4

Student objectives

Find the greatest common factor (GCF) of two whole numbers.
List the factors of a number and identify which factors are shared.

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6th Grade GCF & LCM Worksheets - Finding LCM worksheet

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Finding LCM

6ns4

Student objectives

Find the least common multiple (LCM) of two whole numbers.
List multiples of a number and spot the first multiple two numbers share.
Check that your LCM is a number both original numbers divide into evenly.

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6th Grade GCF & LCM Worksheets - Rewriting Expressions as Multiples of a Sum worksheet

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Rewriting Expressions as Multiples of a Sum

6ns4

Student objectives

Rewrite an expression like 3x + 6 as a multiplication problem with parentheses, like 3(x + 2).
Find the greatest common factor of the terms so you know what number or variable can be factored out.
Keep expressions equivalent while working with coefficients and variables.

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6th Grade GCF & LCM Worksheets - Writing Fractions with the Least Common Denominator worksheet

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Writing Fractions with the Least Common Denominator

6ns4

Student objectives

Find the least common denominator of two fractions.
Write each fraction as an equivalent fraction over it.
Use a common multiple to compare or add fractions.

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6th Grade GCF & LCM Worksheets - Finding the Least Common Multiple of Three Numbers worksheet

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Finding the Least Common Multiple of Three Numbers

6ns4

Student objectives

Find the least common multiple of three numbers.
Use factors rather than listing multiples.
Recognize when one number already is the multiple.

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6th Grade GCF & LCM Worksheets - Factoring a Sum with the Greatest Common Factor worksheet

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Factoring a Sum with the Greatest Common Factor

6ns4

Student objectives

Find the greatest common factor of two two-digit numbers.
Rewrite a sum as the factor times a sum.
Check that nothing is left to factor out.

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More 6th grade topics

Ratios & Unit Rates 21 Negative Numbers & Absolute Value 20 Percents 11 Mean, Median, Mode & Range 16 Exponents & Order of Operations 11 Long Division & Decimal Operations 9 Area of Triangles & Polygons 12 Dividing Fractions 6 Inequalities 6 Histograms & Box Plots 6 One-Step Equations 18 Writing & Simplifying Expressions 13 Volume & Surface Area 9 Coordinate Plane 9

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