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4th and 5th Grade Number Theory Resources

Use this number theory worksheet to practice finding the greatest common factor of two numbers by finding the prime factorization!&nbsp;

Find the Greatest Common Factor By Prime Factorization #1

Find factor pairs of two-digit numbers with this fourth-grade math worksheet!

Find the Factors

Students build their number sense as they practice finding the least common multiple of whole numbers in this math worksheet!&nbsp;

Least Common Multiple: Part 1

Have your fourth graders work through multiplication problems by learning about factors and why they are important for problem solving.

Find the Factors of Prime and Composite Numbers

Grow students&rsquo; math skills with more practice finding the greatest common factor by using factor trees to find the prime factorization.

Find the Greatest Common Factor By Prime Factorization #2

Students practice identifying prime numbers, regular polygons, and irregular polygons!

It's a Maze of Hexagons!

Students practice solving a variety of equations, then determine if the answer is a prime number.

Which Numbers Are Prime?

Find the greatest common factor (GCF) using the&nbsp;prime factorization method with this sixth-grade practice worksheet!

Find the Greatest Common Factor By Prime Factorization #3

From multi-digit subtraction to identifying prime numbers, assess each student&rsquo;s mastery of a variety of fourth-grade math skills.

Math Mixed Review Part 1: Flying Through Fourth Grade

Students build their number sense by finding&nbsp;the multiples of whole numbers in this fourth-grade math worksheet!

Find the Multiples

With this worksheet, your child will be learning about factors, and they'll be getting multiplication practice as they go.

Finding Factors

Students continue to hone their understanding of how to find the least common multiple in this math practice worksheet!&nbsp;

Least Common Multiple: Part 2

Children practice identifying factors with the help of a factor tree in this multiplication worksheet.

Factor Tree

Give students practice identifying prime numbers with this fun this maze activity!

Identifying Prime Numbers Maze

Students will match a product to its factor tree and list of prime factors in this interactive activity.

Matching Factor Tree Cards

What is a prime number? A number is prime when it is only divisible by 1 and itself. Help your little mathematician recognize prime numbers.

Finding Prime Numbers

Help students build their number sense as they practice finding the least common multiple (LCM) in this helpful practice worksheet.

Least Common Multiple: Part 3

Does your child know the difference between a prime number and a composite number? Help them learn the difference with this simple worksheet.

Prime Numbers vs Composite Numbers

Introduce your child to factor trees with this simple algebra worksheet.

Fill in the Factor Tree

Think about the importance of determining the factors of a product.

Factor or Not?

Give your child prime number practice with this simple worksheet.

Prime Number Practice

This worksheet gives students practice identifying multiples of a number.

Which Is Not a Multiple?

Use this glossary with the EL Support Lesson: Multiples and Skip Counting.

Glossary: Multiples and Skip Counting

Use these vocabulary cards with the EL Support Lesson: The Factor Tree Strategy.

Vocabulary Cards: The Factor Tree Strategy

Understanding how our ten number system works enables students to see interesting and useful patterns and relationships in these math activities. These patterns allow students to develop more efficient mental math strategies when multiplying by multiples of 10 or 100. Students will also review rounding and apply this skill to larger numbers - up to 100,000’s place.

Number Sense 3

Use these vocabulary cards with the EL Support Lesson: Conversations About Prime and Composite Numbers.

Vocabulary Cards: Conversations About Prime and Composite Numbers

Learning to identify prime numbers can be tricky. But this fun card game can make memorizing some basic prime numbers a breeze.

In Your Prime

Use this glossary with the EL Support Lesson: Doubling Multiples for Division.

Glossary: Doubling Multiples for Division

Use this glossary with the EL Support Lesson: Factor Friend or Foe?

Glossary: Factor Friend or Foe?

This multi-part worksheet helps students practice identifying the differences between regular and irregular hexagons while also reviewing their knowledge of composite and prime numbers.

More Amaz-ing Hexagons!

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