5th - 8th Grade Common Core Number Theory Worksheets

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

Give your learners practice finding the greatest common factor (GCF) and the least common multiple (LCM) with this fun code-breaking worksheet!

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

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

Boost your learner's understanding of number theory and prime and composite numbers with this sixth-grade math worksheet all about factorization!

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

Give your students practice finding the least common multiple (LCM) with this fun code-breaking worksheet!

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

Become a GCF master with this math worksheet! Practice finding the greatest common factor of 2 or 3 numbers ranging all the way up to 100.

Learners will gain practice differentiating between rational and irrational numbers in this helpful eighth-grade math worksheet!

Give your students practice finding the greatest common factor (GCF) with this fun code-breaking worksheet!

Engage students this fall season with this Halloween-themed hidden picture math puzzle featuring an array of real numbers.

Students build number sense while finding the probability of randomly selecting each digit in the first 100 digits of pi in this engaging math worksheet!

In this eighth-grade math worksheet, students will approximate square roots of non-perfect squares by finding the two whole numbers that the square root falls between.

Students build their number sense as they practice finding the least common multiple of whole numbers in this two-page math worksheet.

Sort and classify real numbers into specific categories with this hands-on math activity!

Give students practice estimating square roots with this eighth-grade number sense worksheet!

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

Practice approximating irrational numbers on number lines with this eighth-grade math worksheet!

Help students solidify their knowledge of rational and irrational numbers by challenging them with this fun and unique maze!

Students practice comparing irrational numbers in this helpful number sense worksheet! 

Teach your students to use factor rainbows to find the greatest common factor of two given numbers.

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

Learners determine if each statement about rational and irrational numbers is true or false in this eighth-grade math worksheet!

Practice finding rational approximations for irrational square roots in this eighth-grade math worksheet! 

Get practice estimating cube roots with this eighth-grade number sense worksheet!

Use this one-page handout to help students solidify their understanding of the real number system!

Give students a chance to demonstrate their understanding of real numbers with unique math worksheet!

Learn how to approximate cube roots with this eighth-grade math worksheet!

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