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# Stack #213681

### Module 4-Math Vocabulary

Real Number A number that is rational or irrational, not imaginary.
Rational Number A number capable of being expressed as an integer or a quotient of integers, excluding zero as a denominator.
Irrational Number Any number that cannot be expressed as the ratio of two natural numbers, Pi and the square root of 2 being familiar examples.
Decimal A linear array of digits that represents a real number, every decimal place indicating a multiple of a negative power of 10.
Repeating Decimal A decimal in which a pattern of one or more digits is repeated indefinitely.
Terminating Decimal A decimal that has only a finite number of nonzero digits to the right of the decimal point.
Greatest Common Factor/Greatest Common Divisor The largest integer that divides without a remainder into a set of integers.
Least Common Multiple The smallest quantity that is divisible by two or more given quantities without a remainder.
Rounding Expressed or designated as a whole number or integer; not fractional.
Truncate To shorten (a number)by dropping one or more digits after the decimal point.
Expanded Notation/Scientific Notation The representation of a number as the sum of a series of terms, each of which is written explicity as the product of a digit and the base of the number system raised to some power. a/k/a scientific notation.
Exponential Form Can be seen just as a way to write expressions like 8x8x8 in a more compact form. 8^3 is the exponential form.
Percent a ratio comparison of two quantities expressed by using 100 equal parts or hundredths; symbolized %. There are three major uses of percent; part of a whole, rate, and comparison of any two quantities.
Created by: Denise G.