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Unit 1

Rational Number Operations

opposites Two numbers that lie the same distance from 0 on the number line but in opposite directions (-1, 1)
additive inverse The additive inverse of any number x is the number that gives zero when added to x (5, -5
integers All whole numbers and their opposites
absolute value The distance of a number from zero on a number line.
zero pair a pair of numbers whose sum is zero
difference Solution to a subtraction problem
sum Solution to an addition problem
inverse operations Operations that undo each other (+, -)
numerator The number above the fraction bar that indicates the number of parts of the whole there are in a rational number
denominator The number below the fraction bar that indicates how many parts the whole is divided into
terminating decimal While expressing a fraction into a decimal by the division method, if the division comes to an end after a finite number of steps, then such a decimal is a Terminating Decimal. Examples : 1⁄4 = 0.25
repeating decimal A digit or a set of digits in the decimal part is repeated continuously. Example: 5⁄6 = 0.8333....
rational number Any number that can be expressed as a ratio of two integers.
least common multiple The smallest positive number that is a multiple of two or more given numbers.
trigger words Words or Phrases that tell you to do a certain mathematical operation such as addition or subtraction
Created by: Mrs Ott