"In general, the number theory is the study of the characteristics of and relationships involving the natural numbers" (O'Daffer, et al, 2008).This purpose of this mindmap is to serve as a reference tool to K-8 educators on the topic of number theory. This map includes a number of resources including key definitions, practice worksheets, learning games, and videos.
Key Definitions
Prime Numbers
Link brings you to a site that defines prime numbers. It also provides a chart of all prime numbers up to 1000.
Greatest Common Factor (GCF)
Link to website to define greatest common factor and provides examples.
Least Common Multiple (LCM)
Link to website to define least common multiple and provides examples.
aPractice
Worksheets
Prime Factorization
(Multiple Worksheets)
Website allows you to create multiple worksheets on prime factorization. Answer key provided.
Learning Games
Fruit Shoot
Link to interactive game to help players refine their skills in identifying prime numbers and composite numbers.
aJeopardy
Factors and Multiples Jeopardy game covers concepts such as factors, multiples, prime factorization, GCF, and LCM.
aVideos
Math Made Easy:
Prime vs. Composite Numbers
This is a video that further explains the difference between prime numbers and composite numbers.
Key Definitions
Factor
This link brings you to a page that defines what a factor is. This link also provides examples of factors.
aMultiple
This link brings you to a page that defines what a multiple is. This link also provides examples of multiples.
Divisibility
This link brings you to a page that defines what divisibility means and also provides examples.
aPractice
Worksheets
Factoring
and prime numbers
This link brings you to a website that offers a series of example problems on factoring and prime numbers. Answers are also provided.
Divisibility
and Factors
This link brings you to a website that offers a series of problems on divisibility and factors. Answers are also provided.
Learning Games
Side by Side Factors
The object is to rearrange the seven numbers in a row, so that all the numbers which are not relatively prime are separated by one or more other numbers.
Videos