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4th Grade Number Theory Resources

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

Find the Factors

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

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?

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

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

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: 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!

Players use their knowledge of factors and multiples to help their dinosaur win this math battle.

Dino Crunch: Finding Multiples

Use this glossary with the EL Support Lesson: The Factor Tree Strategy.

Glossary: The Factor Tree Strategy

Players navigate rivers and streets while demonstrating their knowledge of factors and multiples.

Jumpy: Find the Multiples

Use these vocabulary cards with the EL Support Lesson: Factor Friend or Foe?

Vocabulary Cards: Factor Friend or Foe?

Help Roly to catch all the dinos in this high-flying fourth grade math game! 

Dino Pet Drop: Identifying Multiples (Game 1)

Grow your fourth grader's number sense skills with this fishing-themed math game! 

Dino Fishing: Composite Numbers

Hone mental math skills and boost knowledge of factors and multiples in this skateboarding adventure.

Dino Skateboarding: Find the Factors

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