Sum - The answer to an addition problem, Difference - The answer to a subtraction problem, Product - The answer to a multiplication problem, Quotient - The answer to a division problem, Numerator - The number on top of a fraction, Denominator - The number on the bottom of a fraction, Simplify - Reducing the expression/fraction/problem in a simpler form, Equivalent - When two or more quantities have the same value, Integer - A number with no decimal or fractional part and it includes negative and positive numbers, including zero, Fraction - Represents a part of a whole or, more generally, any number of equal parts, Percent - a number or ratio that can be expressed as a fraction of 100, Tax - a percent of the purchase price, Tip - An amount of money given as a 'thank you' for the service. The amount is usually a percentage, or part of, the total, Markup - The difference between a product's selling price and cost as a percentage of the cost, Discount - A reduction in the price of a product or service, Percent Error - The difference between estimated value and the actual value in comparison to the actual value and is expressed as a percentage, Percent of Change - The difference between the final value and the initial value, expressed as a percentage, and is calculated by dividing the difference by the initial value and multiplying by 100, Simple Interest - A technique used to calculate the proportion of interest paid on a sum over a set time period at a set rate. I=PRT, Absolute Value - The distance of an integer from zero on a number line. Always positive., Substitute - Replacing the variables in an algebraic expression, equation or inequality,

The Number System Definitions

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