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Finding Factors

For Students 6th - 8th
In this finding factors worksheet, middle schoolers practice finding all the factors of 24 in twenty word equations and then find the prime factorization in ten equations.
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Factoring Numbers

For Students 4th - 6th
In this factoring worksheet, learners read about composite and prime numbers. They then read through 2 example problems regarding factors. Finally, students solve the 6 problems at the bottom of the page.
Lesson Plan
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ISTEP + Grade 6 Item Sampler

For Teachers 5th - 6th
In this cross-curricular sampler of worksheets, students determine the meaning of specialized vocabulary and to understand the precise meaning of grade-level-appropriate words, describe and connect the essential ideas, arguments, and...
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Factors and Greatest Common Factor

For Students 9th
In this factors and greatest common factor worksheet, 9th graders solve and complete 14 different problems. First, they state whether each number is prime or composite. Then, students find the prime factorization. In addition, they...
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Identify Numbers

For Students Higher Ed
In this identify numbers worksheet, students identify prime, composite, perfect, deficient, and abundant numbers listed on a one-hundred board. This two-page worksheet contains one-hundred numbers on each page.
Lesson Plan
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Factor Trees

For Teachers 4th - 7th
In this factor trees worksheet, students make factor trees for 2 through 4 digit numbers. Students complete 20 factor trees for these numbers.
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Prime Numbers

For Students 3rd - 5th
In this identifying prime numbers from one to fifty learning exercise, students review prime numbers and color the prime numbers on the chart. Students color 15 answers. 
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Math Worksheet: Factoring

For Students 4th - 5th
For this math factoring worksheet, students write a multiplication equation with prime numbers that equals the given product. There are no examples or explanations of the math vocabulary. There are18 problems to solve.
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Finding Primes-The Sieve of Eratosthenes

For Students 7th - 9th
In this middle school/Algebra I worksheet, students use the sieve of Eratosthenes to determine the prime number less than two hundred.  The one page worksheet contains one problem.  Answer is not provided. 
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Counting from 1-20 - Odd and Even Numbers

For Students 2nd
In this number recognition worksheet, 2nd graders examine a number chart that includes the numbers 1- 20. They record all of the even numbers on one line, and all of the odd numbers on a second line.
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Divisibility

For Students 6th
In this divisibility instructional activity, 6th graders solve 10 different problems that include determining whether various numbers are divisible by other numbers. They write yes on the line provided if the number is divisible or no if...
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My Test Book: Rational and Irrational Numbers

For Students 6th - 8th
In this online interactive math skills worksheet, middle schoolers solve 10 multiple choice math problems regarding rational and irrational numbers. Students may submit their answers to be scored.
Activity
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Illustrative Mathematics

Identifying Multiples

For Teachers 3rd - 5th Standards
Administer an activity that fosters a child's understanding of multiples. Young mathematicians are guided to complete three tasks on a multiplication chart. Once they color the boxes with multiples of two, three, and four, learners...
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K12 Reader

Eratosthenes: Geographer and Mathematician

For Students 4th - 5th Standards
Mathematicians can be famous, too! Introduce your class to Eratosthenes with a reading passage. After they complete the passage, learners respond to five questions, some of which require opinions and others reading comprehension skills.
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Number Theory Worksheet 2: The Sieve of Eratosthenes

For Students 5th - 6th
In this primes and multiples worksheet, students follow the directions to circle primes and multiples on a hundred chart until all prime numbers from 1 to 100 are circled. This is called the Sieve of Eratosthenes.
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Number Theory Worksheet 2: The Sieve of Eratosthenes

For Students 4th - 6th
in this number theory activity, students use the Sieve of Eratosthenes to find all primes up to the number 100. Students follow the directions to circle primes and multiples on the hundred chart.
Lesson Plan
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Patterns

For Teachers 9th
In this Algebra I worksheet, 9th graders explore number and geometric patterns and use the Sieve of Eratosthenes to find the prime numbers less than one hundred.  The six page worksheet contains eight multipart questions. ...
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Eratosthenes Sieve¦

For Students 6th - 8th
In this math worksheet, middle schoolers find the prime numbers through going through the factors in sequential order. The answers are used to create the words at the bottom of the page.
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Factors and Greatest Common Factor

For Students 9th
In this factors worksheet, 9th graders solve and complete 39 different problems that include determining the greatest common factor to solve. First, they state whether each number is prime or composite. Then, students factors each...
Activity
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K-5 Mathematics Module: Number and Number Sense

For Students K - 5th Standards
Reinforce number sense with a collection of math lessons for kindergarteners through fifth graders. Young mathematicians take part in hands-on activities, learning games, and complete skills-based worksheets to enhance proficiency...
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Factors Game

For Students 6th - 8th
In this factors game learning exercise, teams of middle schoolers identify factors.  They find proper factors of a given number  This one-page learning exercise cotnains approximately 40 problems.
Worksheet
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Number Theory: The Sieve of Eratosthenes

For Students 4th - 6th
In this number theory worksheet, students read about The Sieve of Eratosthenes and follow a set of directions to complete a prime number activity and answer 4 related questions.
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Greatest Common Factor #2

For Students 4th - 5th
In this GCF worksheet, students fill in missing number in factor trees, then determine whether numbers are prime or composite. Worksheet includes links to answers and additional worksheets.
Worksheet
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Division word problems

For Students 5th - 8th
In this division worksheet, students complete division word problems. Students complete 10 multiplication problems that pertain to the concept of division.

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