Curated OER
Prime Numbers: Eratosthenes' Sieve
By offering a step-by-step explanation of how to identify prime numbers, this presentation would be a terrific way to give learners a visual example of prime numbers. This is a simple, and easy way, for students to understand the "why"...
Curated OER
Prime Numbers
Remembering which numbers are prime can be a snap if you have a graphic to help you out. As this printable 8x11 image will tell you, a prime is a number which can only be divided by one and itself. Number 1-100 are enclosed in pretty...
Curated OER
Time for Prime
Explore prime numbers. Learners use an interactive 100's chart to identify prime numbers, discuss a glossary of terms, use cards to list multiples of 2,3,4,5, and play a bingo game.
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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....
Helping with Math
Factors With Prime and Composite Numbers (1 of 2)
Math monsters examine nine numbers, factor them, and then determine if they are composite or prime. You can print this learning exercise off of the website, but it does not fit neatly onto one page. Consider projecting it on your class...
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Prime Numbers
Prime numbers are the focus of this math learning exercise. Students follow directions to identify prime numbers on a hundreds chart. Students follow clear directions in order to find a total of 25 prime numbers on the chart.
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Prime and Composite Numbers - Kenwood Academy
Learners investigate prime and composite numbers. They use a number chart and cross out multiples of 2,3,5 etc. up to 100. Pupils fold pieces of masking tape around pennies and label them with composite numbers, then fold masking tape...
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Prime Numbers
In this prime numbers worksheet, students read facts and complete comprehension activities. In this graph construction and drawing worksheet, students complete two activities.
CK-12 Foundation
Prime and Composite Numbers
Nine true or false, multiple-choice, and discussion questions make up an interactive designed to reinforce scholars' knowledge of prime and composite numbers. A number chart reveals every prime number through 100.
K20 LEARN
Prime Time
How many prime numbers are there between 1 and 100? By using a prime time resource, your scholars should be able to answer this question. Using arrays, they determine if numbers are prime or composite, and then write a prime...
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Prime Time
Seventh graders practice determining the prime factorization of composite numbers. They create Christmas factor trees for prime numbers greater than 100. They decorate their final products with markers, crayons, colored pencils, glitter...
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In Your Prime
Students study how to find prime numbers. They investigate the teachings of the mathematician Eratosthenes and apply his theory of prime numbers less than 100.
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Prime Time
Fifth graders complete activities related to prime and composite numbers. In this prime lesson, 5th graders make a hundreds chart with all the prime numbers. They create their own card game which deals with prime and composite numbers.
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Twenty Questions: The Hundred Chart
Use the 20 Questions game to practice math vocabulary and number properties! Project a hundreds chart and hand one out to learners. Ideally, give them counters (beans would work well) to mark off the chart so you can play multiple times....
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Prime and Composite Numbers
Fifth graders use prime factorization to identify prime and composite numbers. They use cubes to find factors. In groups, 5th graders draw rectangular arrays to discover prime numbers under 100.
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Prime Real Estate
Students analyze and discuss prime numbers and the Sieve of Eratosthenes, a procedure to sort out prime numbers. They identify the prime numbers from 1-100 by eliminating all the multiples of the first four prime numbers, and circle what...
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Am I Am I Prime?
Seventh graders determine if a number is prime or composite. In this determining if a number is prime or composite lesson, 7th graders use a website to help find all prime numbers between 1 and 100. Students use a website to find...
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SAT Problem Solving Practice Test 06
In this SAT activity, students solve 10 multiple choice questions. Students find ratios, integer relationships, prime numbers, etc.
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Factors, Prime Factorization, Multiples
Seventh graders examine Prime Factorizations, Multiples, and Factors. In this prime number, factorization, and multiples lesson, 7th graders identify greatest common factors and least common multiples. Students use problem solving skills...
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Primes and Prime Factors
In this primes and prime factors instructional activity, 8th graders solve 21 different problems to include identifying each number as prime, composite, or neither prime nor composite and listing all the primes less than 200. Then they...
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Patterns
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. Answers are...
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Factors and Factorization
For this factors worksheet, learners list all factors of given numbers. All numbers are positive and contain two to three digits. This four-page worksheet contains 28 problems. Answers are provided.
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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.
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Prime Factorization
In these prime factorization worksheets, students make a factor tree of the given numbers and then write the answers using exponential notation. Students then use multiplication to check their factoring work. Students evaluate the...