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# 8th Math Mod 1

### Real Numbers

TermDefinition
like terms two or more terms that have the same variable raised to the same power. Ex. In the expression 3a + 5b +12a, 3a and 12a are like terms.
perfect square a square of a whole number
principal square root the nonnegative square root of a number
rational number any number that can be expressed as a ratio of two integers. EX. 6 can be expressed as 6/1 and 0.5 can be expressed as 1/2.
real number a rational or irrational number.
repeating decimals a decimal in which one or more digits repeat infinitely.
integers the set of whole numbers and their opposites. Expressed symbolically {...-3,-2,-1,0,1,2,3...}
whole number the set of natural numbers and zero. Expressed symbolically {0,1,2,3,...}
irrational numbers a number that cannot be expressed as a ratio of two integers or as a repeating or terminating decimal. EX. π, √2
Created by: ashaver