Unit 1 Vocabulary

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Real Number System
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Terms in this set (20)
Real Number System
the set of all rational and irrational numbers
rational number
Any number that can be expressed as a ratio of two integers
whole numbers
Natural numbers ( counting numbers) and zero; 0, 1, 2, 3...
Natural Numbers
The set of numbers 1, 2, 3, 4, ... Also called counting numbers.
Integers
The set of whole numbers and their opposites
irrational numbers
Numbers that cannot be expressed as a ratio of two integers. Their decimal forms do not terminate or repeat
complex fraction
a fraction that contains one or more fractions in the numerator, the denominator, or both
greatest common factor
The largest factor that two or more numbers have in common. Also known as GCF
least common multiple
The smallest multiple (other than zero) that two or more numbers have in common. Also known as LCM
terminating decimal
A decimal number that ends or terminates
repeating decimalA decimal in which one or more digits repeat infinitelyfractionpart of a wholeimproper fractiona fraction whose numerator is greater than the denominatormixed numbera number made up of a whole number and a fractionexpressionA mathematical phrase that contains operations, numbers, and/or variables.absolute valueThe distance a number is from zero on a number line. ALWAYS POSITIVEOppositestwo numbers that have the same absolute value but have different signsAdditive InverseAny number plus its opposite equals zero; a + (-a) = 0zero paira number and its opposite, which add to 0Reciprocalthe inverse of a number; if we multiply a number by its reciprocal, it gives a value equal to 1. Thus, it is also called multiplicative inverse