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### We found 270 resources with the concept prime numbers

Lesson Planet

#### Prime Numbers Sieve

A very quick look at a multiplication table and how to eliminate numbers according to multiples of 2,3, 5, and 7. After eliminating these multiples, the numbers you are left with are prime.

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#### What's Another Definition for Prime and Composite Numbers?

Simply put, a prime number is a number that is divisible only by one and itself. All other numbers are composite.

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#### What's a Prime Polynomial?

The instructor defines a prime polynomial as much the same as a prime number: they only have two factors, 1 and itself. She further demonstrates what a composite polynomial is to give an example of a polynomial that is not prime.

Lesson Planet

#### Prime Factorization

Factoring is an important math skill, and it's often quite confusing for youngsters. This presentation does a good job of showing the basic skills and vocabulary needed to begin to understand this important process. Prime numbers,...

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#### Factors of Numbers from 31 to 65

Finding factors is an integral aspect of multiplication. Although there are two examples here, they don't illustrate the process so you will still need to model this a few times for scholars. First, mathematicians list the factors for...

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#### Finding Factors

In this finding factors worksheet, students practice finding all the factors of 24 in twenty word equations and then find the prime factorization in ten equations.

Lesson Planet

#### What is Prime Factorization?

A teacher describes how to find the prime factors of 525. She starts by describing how to use a factor tree to describe the factors of a number. Next, she uses increasingly difficult examples to illustrate this concept.

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#### Prime and Composite Numbers

Prime and composite numbers are the focus of this mathematics lesson. In it, learners practice techniques for identifying these two types of numbers. They utilize the Inspiration program to complete a task that is clearly explained, and...

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#### Factors of Numbers from 66 to 100

Finding factors requires practice and a logical system, so help scholars develop this skill with these problems. They write out the factor list for 9 two-digit numbers and then circle the factors from a list for four more numbers....

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#### Factors of Numbers from 1 to 30

Finding factors is an integral skill on the road to fractions and algebra. Scholars write down a factor list for nine numbers up to 30. Next, they examine provided lists and circle the numbers that are factors of eight more numbers, also...

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#### Review of Pre-Algebra

Middle and high schoolers review topics coveredÂ Pre-Algebra. They solve problems questions dealing with exponents, square roots and absolute value. They use the rules of divisibility and identify prime numbers. This two-page on-line...

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#### Food For Fractions

Who doesn't like to eat? Use food to explore the concept of fractions and how to multiply and divide fractions. In small groups they plan a sugar potluck that involves converting a recipe to produce enough dessert treats to feed the...

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#### Number, Number Sense and Operations: Worksheet Four

Review a variety of mathematical skills with this worksheet. In this number sense and operations worksheet, learners solve 15 different problems that include simplifying various equations. In addition, they write the powers in order from...

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#### Smart Cookie Factors

Learners examine the concept of finding the greatest common factor. They complete number of activities as they practice identifying prime and composite numbers. Pupils apply rules of divisibility and find the greatest common factor while...

Lesson Planet

#### Prime Composite Worksheet

Children determine if the 45 numbers listed are prime numbers or composite numbers. They check off their answers. A very good resource!

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#### Prime and Composite Numbers - Problem Solving 9.1

Elementary schoolers read and solve six mathematical word problems involving prime and composite numbers. Very good practice and a very good worksheet.

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#### Prime Factorization Mobile

Learners examine and discuss prime numbers, composite numbers, and prime factorization. They develop and create a factor tree mobile using exponents.

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#### Composite and Prime Numbers

Young math whizzes determine if a number is prime or composite. They use counters to participate in activities that show prime and composite numbers.

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#### Fib-o-who? - Enrichment 9.1

For this Fibonacci number sequence worksheet, learners problem solve the answers to six word problems involving the process of his number sequence.

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#### Mixed Prime Number and Fraction Worksheet

A terrific worksheet on mixed numbers, factoring, and fractions is here for you. Learners identify the 12 given numbers as prime or composite and write the prime factorization for eight given numbers. They also simplify six fractions and...

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#### Probability of Numbers

In this applying the probability of numbers from one to fifty worksheet, students find divisors, prime numbers, composite numbers, and designated place value numbers. Students solve five problems.

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#### Factor Trees

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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#### Word Problem - GCF

Using a word problem, the narrator helps describe how to find the greatest common factor. Not only does she explore the ways to identify the greatest common factor, she also shows how to determine when a math problem is asking for this...

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#### How Do You Find GCF and LCM?

Using the numbers 225 and 270, the narrator explains how to find the greatest common factor and the least common multiple. This presentation could be used in conjunction with other videos in a series exploring how to identify prime...