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# Math Vocabulary

### Numbers

TermDefinition
Counting Numbers The set of counting numbers, or natural numbers, begins with the numer 1 and continues into infinity. Ex. {1,2,3,4,5,6,7,8,9,10...}
Whole Numbers The set of whole numbers is the same as the set of counting numbers, EXCEPT that it begins with 0. Ex. {0,1,2,3,4,5,6,7,,8,9,10...}
Rational Numbers The set of rational numbers includes any number that can be written in the form of a fraction, as long as the denominator is not equal to 0. All counting numbers and whole numbers are also rational numbers.
Prime Numbers Counting numbers that can be divided by only two numbers - 1 and themselves. Prime numbers can also be described as a couting number with only two factors, 1 and itself. The number 1 is not a prime number. Examples: 2,3,5,7,11,13,17,19,23,29,31,37...
Composite Numbers Numbers that have more than two factors. The number 1 is not composite. Examples: 4,6,8,9,10,12,14,15,16,18,20,21,22,24,25,26,27,28,30,32...
Even Numbers Include the numbers 0 and 2 and all numbers that can be divided evenly by 2.
Odd Numbers All numbers that cannot be divided evenly by 2.
Integers any number from the set {…-4,-3,-2,-1,0,1,2,3,4…}
Negative Numbers Numbers that are less than 0. Ex. -4,-3,-2,-1
Positive Numbers Numbers greater than 0. Ex. 1,2,3,4,5...
Created by: missrusinek