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3rd - 5th Grade Number Theory Resources

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Find the Greatest Common Factor By Prime Factorization #1
Find the Greatest Common Factor By Prime Factorization #1
Interactive Worksheet
Find the Greatest Common Factor By Prime Factorization #1 large image
Find the Greatest Common Factor By Prime Factorization #1
Fifth Grade
Number Theory
Use this number theory worksheet to practice finding the greatest common factor of two numbers by finding the prime factorization! 
Interactive Worksheet
Find the Greatest Common Factor By Prime Factorization #1
Find the Greatest Common Factor By Prime Factorization #1
Interactive Worksheet
Find the Greatest Common Factor By Prime Factorization #1
Use this number theory worksheet to practice finding the greatest common factor of two numbers by finding the prime factorization! 
Fifth Grade
Number Theory
Interactive Worksheet
Find the Factors
Find the Factors
Worksheet
Find the Factors large image
Find the Factors
Fourth Grade
Number Theory
Find factor pairs of two-digit numbers with this fourth-grade math worksheet!
Worksheet
Find the Factors
Find the Factors
Worksheet
Find the Factors
Find factor pairs of two-digit numbers with this fourth-grade math worksheet!
Fourth Grade
Number Theory
Worksheet
Least Common Multiple: Part 1
Least Common Multiple: Part 1
Interactive Worksheet
Least Common Multiple: Part 1 large image
Least Common Multiple: Part 1
Fifth Grade
Number Theory
Students build their number sense as they practice finding the least common multiple of whole numbers in this math worksheet! 
Interactive Worksheet
Least Common Multiple: Part 1
Least Common Multiple: Part 1
Interactive Worksheet
Least Common Multiple: Part 1
Students build their number sense as they practice finding the least common multiple of whole numbers in this math worksheet! 
Fifth Grade
Number Theory
Interactive Worksheet
Identifying Prime Numbers Maze
Identifying Prime Numbers Maze
Interactive Worksheet
Identifying Prime Numbers Maze large image
Identifying Prime Numbers Maze
Fourth Grade
Number Theory
Give students practice identifying prime numbers with this fun this maze activity!
Interactive Worksheet
Identifying Prime Numbers Maze
Identifying Prime Numbers Maze
Interactive Worksheet
Identifying Prime Numbers Maze
Give students practice identifying prime numbers with this fun this maze activity!
Fourth Grade
Number Theory
Interactive Worksheet
Jumpy: Find the Multiples
Jumpy: Find the Multiples
Game
Jumpy: Find the Multiples large image
Jumpy: Find the Multiples
Fourth Grade
Number Theory
Players navigate rivers and streets while demonstrating their knowledge of factors and multiples.
Game
Jumpy: Find the Multiples
Jumpy: Find the Multiples
Game
Jumpy: Find the Multiples
Players navigate rivers and streets while demonstrating their knowledge of factors and multiples.
Fourth Grade
Number Theory
Game
Find the Factors of Prime and Composite Numbers
Find the Factors of Prime and Composite Numbers
Exercise
Find the Factors of Prime and Composite Numbers large image
Find the Factors of Prime and Composite Numbers
Fourth Grade
Number Theory
Have your fourth graders work through multiplication problems by learning about factors and why they are important for problem solving.
Exercise
Find the Factors of Prime and Composite Numbers
Find the Factors of Prime and Composite Numbers
Exercise
Find the Factors of Prime and Composite Numbers
Have your fourth graders work through multiplication problems by learning about factors and why they are important for problem solving.
Fourth Grade
Number Theory
Exercise
Finding Factors
Finding Factors
Worksheet
Finding Factors large image
Finding Factors
Fourth Grade
Multiplication
With this worksheet, your child will be learning about factors, and they'll be getting multiplication practice as they go.
Worksheet
Finding Factors
Finding Factors
Worksheet
Finding Factors
With this worksheet, your child will be learning about factors, and they'll be getting multiplication practice as they go.
Fourth Grade
Multiplication
Worksheet
Find the Greatest Common Factor By Prime Factorization #2
Find the Greatest Common Factor By Prime Factorization #2
Interactive Worksheet
Find the Greatest Common Factor By Prime Factorization #2 large image
Find the Greatest Common Factor By Prime Factorization #2
Fifth Grade
Number Theory
Grow students’ math skills with more practice finding the greatest common factor by using factor trees to find the prime factorization.
Interactive Worksheet
Find the Greatest Common Factor By Prime Factorization #2
Find the Greatest Common Factor By Prime Factorization #2
Interactive Worksheet
Find the Greatest Common Factor By Prime Factorization #2
Grow students’ math skills with more practice finding the greatest common factor by using factor trees to find the prime factorization.
Fifth Grade
Number Theory
Interactive Worksheet
Math Mixed Review Part 1: Flying Through Fourth Grade
Math Mixed Review Part 1: Flying Through Fourth Grade
Worksheet
Math Mixed Review Part 1: Flying Through Fourth Grade large image
Math Mixed Review Part 1: Flying Through Fourth Grade
Fourth Grade
Mixed Operations
From multi-digit subtraction to identifying prime numbers, assess each student’s mastery of a variety of fourth-grade math skills.
Worksheet
Math Mixed Review Part 1: Flying Through Fourth Grade
Math Mixed Review Part 1: Flying Through Fourth Grade
Worksheet
Math Mixed Review Part 1: Flying Through Fourth Grade
From multi-digit subtraction to identifying prime numbers, assess each student’s mastery of a variety of fourth-grade math skills.
Fourth Grade
Mixed Operations
Worksheet
Find the Multiples
Find the Multiples
Interactive Worksheet
Find the Multiples large image
Find the Multiples
Fourth Grade
Number Theory
Students build their number sense by finding the multiples of whole numbers in this fourth-grade math worksheet!
Interactive Worksheet
Find the Multiples
Find the Multiples
Interactive Worksheet
Find the Multiples
Students build their number sense by finding the multiples of whole numbers in this fourth-grade math worksheet!
Fourth Grade
Number Theory
Interactive Worksheet
Find the Greatest Common Factor By Prime Factorization #3
Find the Greatest Common Factor By Prime Factorization #3
Interactive Worksheet
Find the Greatest Common Factor By Prime Factorization #3 large image
Find the Greatest Common Factor By Prime Factorization #3
Fifth Grade
Number Theory
Find the greatest common factor (GCF) using the prime factorization method with this sixth-grade practice worksheet!
Interactive Worksheet
Find the Greatest Common Factor By Prime Factorization #3
Find the Greatest Common Factor By Prime Factorization #3
Interactive Worksheet
Find the Greatest Common Factor By Prime Factorization #3
Find the greatest common factor (GCF) using the prime factorization method with this sixth-grade practice worksheet!
Fifth Grade
Number Theory
Interactive Worksheet
Which Numbers Are Prime?
Which Numbers Are Prime?
Worksheet
Which Numbers Are Prime? large image
Which Numbers Are Prime?
Fourth Grade
Number Theory
Students practice solving a variety of equations, then determine if the answer is a prime number.
Worksheet
Which Numbers Are Prime?
Which Numbers Are Prime?
Worksheet
Which Numbers Are Prime?
Students practice solving a variety of equations, then determine if the answer is a prime number.
Fourth Grade
Number Theory
Worksheet
It's a Maze of Hexagons!
It's a Maze of Hexagons!
Worksheet
It's a Maze of Hexagons! large image
It's a Maze of Hexagons!
Fourth Grade
Number Theory
Students practice identifying prime numbers, regular polygons, and irregular polygons!
Worksheet
It's a Maze of Hexagons!
It's a Maze of Hexagons!
Worksheet
It's a Maze of Hexagons!
Students practice identifying prime numbers, regular polygons, and irregular polygons!
Fourth Grade
Number Theory
Worksheet
Least Common Multiple: Part 3
Least Common Multiple: Part 3
Interactive Worksheet
Least Common Multiple: Part 3 large image
Least Common Multiple: Part 3
Fifth Grade
Number Theory
Help students build their number sense as they practice finding the least common multiple (LCM) in this helpful practice worksheet.
Interactive Worksheet
Least Common Multiple: Part 3
Least Common Multiple: Part 3
Interactive Worksheet
Least Common Multiple: Part 3
Help students build their number sense as they practice finding the least common multiple (LCM) in this helpful practice worksheet.
Fifth Grade
Number Theory
Interactive Worksheet
Least Common Multiple: Part 2
Least Common Multiple: Part 2
Interactive Worksheet
Least Common Multiple: Part 2 large image
Least Common Multiple: Part 2
Fifth Grade
Number Theory
Students continue to hone their understanding of how to find the least common multiple in this math practice worksheet! 
Interactive Worksheet
Least Common Multiple: Part 2
Least Common Multiple: Part 2
Interactive Worksheet
Least Common Multiple: Part 2
Students continue to hone their understanding of how to find the least common multiple in this math practice worksheet! 
Fifth Grade
Number Theory
Interactive Worksheet
Prime Numbers vs Composite Numbers
Prime Numbers vs Composite Numbers
Interactive Worksheet
Prime Numbers vs Composite Numbers large image
Prime Numbers vs Composite Numbers
Fourth Grade
Number Theory
Does your child know the difference between a prime number and a composite number? Help them learn the difference with this simple worksheet.
Interactive Worksheet
Prime Numbers vs Composite Numbers
Prime Numbers vs Composite Numbers
Interactive Worksheet
Prime Numbers vs Composite Numbers
Does your child know the difference between a prime number and a composite number? Help them learn the difference with this simple worksheet.
Fourth Grade
Number Theory
Interactive Worksheet
Factor Tree
Factor Tree
Worksheet
Factor Tree large image
Factor Tree
Fourth Grade
Multiplication
Children practice identifying factors with the help of a factor tree in this multiplication worksheet.
Worksheet
Factor Tree
Factor Tree
Worksheet
Factor Tree
Children practice identifying factors with the help of a factor tree in this multiplication worksheet.
Fourth Grade
Multiplication
Worksheet
Dino Fishing: Composite Numbers
Dino Fishing: Composite Numbers
Game
Dino Fishing: Composite Numbers large image
Dino Fishing: Composite Numbers
Fourth Grade
Number Theory
Grow your fourth grader's number sense skills with this fishing-themed math game!
Game
Dino Fishing: Composite Numbers
Dino Fishing: Composite Numbers
Game
Dino Fishing: Composite Numbers
Grow your fourth grader's number sense skills with this fishing-themed math game!
Fourth Grade
Number Theory
Game
Dino Crunch: Finding Multiples
Dino Crunch: Finding Multiples
Game
Dino Crunch: Finding Multiples large image
Dino Crunch: Finding Multiples
Fourth Grade
Number Theory
Players use their knowledge of factors and multiples to help their dinosaur win this math battle.
Game
Dino Crunch: Finding Multiples
Dino Crunch: Finding Multiples
Game
Dino Crunch: Finding Multiples
Players use their knowledge of factors and multiples to help their dinosaur win this math battle.
Fourth Grade
Number Theory
Game
Dino Bones: Prime Numbers
Dino Bones: Prime Numbers
Game
Dino Bones: Prime Numbers large image
Dino Bones: Prime Numbers
Fourth Grade
Number Theory
Learners differentiate between prime and composite numbers while unearthing dinosaur bones.
Game
Dino Bones: Prime Numbers
Dino Bones: Prime Numbers
Game
Dino Bones: Prime Numbers
Learners differentiate between prime and composite numbers while unearthing dinosaur bones.
Fourth Grade
Number Theory
Game
More Amaz-ing Hexagons!
More Amaz-ing Hexagons!
Worksheet
More Amaz-ing Hexagons! large image
More Amaz-ing Hexagons!
Fourth Grade
Number Theory
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.
Worksheet
More Amaz-ing Hexagons!
More Amaz-ing Hexagons!
Worksheet
More Amaz-ing Hexagons!
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.
Fourth Grade
Number Theory
Worksheet
Factor or Not?
Factor or Not?
Worksheet
Factor or Not? large image
Factor or Not?
Fourth Grade
Multiplication
Think about the importance of determining the factors of a product.
Worksheet
Factor or Not?
Factor or Not?
Worksheet
Factor or Not?
Think about the importance of determining the factors of a product.
Fourth Grade
Multiplication
Worksheet
Which Is Not a Multiple?
Which Is Not a Multiple?
Worksheet
Which Is Not a Multiple? large image
Which Is Not a Multiple?
Fourth Grade
Multiplication
This worksheet gives students practice identifying multiples of a number.
Worksheet
Which Is Not a Multiple?
Which Is Not a Multiple?
Worksheet
Which Is Not a Multiple?
This worksheet gives students practice identifying multiples of a number.
Fourth Grade
Multiplication
Worksheet
Prime Number Practice
Prime Number Practice
Worksheet
Prime Number Practice large image
Prime Number Practice
Fourth Grade
Number Theory
Give your child prime number practice with this simple worksheet.
Worksheet
Prime Number Practice
Prime Number Practice
Worksheet
Prime Number Practice
Give your child prime number practice with this simple worksheet.
Fourth Grade
Number Theory
Worksheet
Number Sense 3
Number Sense 3
Guided Lesson
Number Sense 3 large image
Number Sense 3
Fourth Grade
Multiplication
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.
Guided Lesson
Number Sense 3
Number Sense 3
Guided Lesson
Number Sense 3
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.
Fourth Grade
Multiplication
Guided Lesson
Factors of 60
Factors of 60
Worksheet
Factors of 60 large image
Factors of 60
Third Grade
Multiplication
Use your multiplication skills to find factors of 60 and better understand time.
Worksheet
Factors of 60
Factors of 60
Worksheet
Factors of 60
Use your multiplication skills to find factors of 60 and better understand time.
Third Grade
Multiplication
Worksheet
Matching Factor Tree Cards
Matching Factor Tree Cards
Worksheet
Matching Factor Tree Cards large image
Matching Factor Tree Cards
Fourth Grade
Number Theory
Students will match a product to its factor tree and list of prime factors in this interactive activity.
Worksheet
Matching Factor Tree Cards
Matching Factor Tree Cards
Worksheet
Matching Factor Tree Cards
Students will match a product to its factor tree and list of prime factors in this interactive activity.
Fourth Grade
Number Theory
Worksheet
Finding Prime Numbers
Finding Prime Numbers
Worksheet
Finding Prime Numbers large image
Finding Prime Numbers
Fourth Grade
Number Theory
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.
Worksheet
Finding Prime Numbers
Finding Prime Numbers
Worksheet
Finding Prime Numbers
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.
Fourth Grade
Number Theory
Worksheet
Fill in the Factor Tree
Fill in the Factor Tree
Interactive Worksheet
Fill in the Factor Tree large image
Fill in the Factor Tree
Fourth Grade
Multiplication
Introduce your child to factor trees with this simple algebra worksheet.
Interactive Worksheet
Fill in the Factor Tree
Fill in the Factor Tree
Interactive Worksheet
Fill in the Factor Tree
Introduce your child to factor trees with this simple algebra worksheet.
Fourth Grade
Multiplication
Interactive Worksheet
Dino Skateboarding: Find the Factors
Dino Skateboarding: Find the Factors
Game
Dino Skateboarding: Find the Factors large image
Dino Skateboarding: Find the Factors
Fourth Grade
Number Theory
Hone mental math skills and boost knowledge of factors and multiples in this skateboarding adventure.
Game
Dino Skateboarding: Find the Factors
Dino Skateboarding: Find the Factors
Game
Dino Skateboarding: Find the Factors
Hone mental math skills and boost knowledge of factors and multiples in this skateboarding adventure.
Fourth Grade
Number Theory
Game
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