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### 45 Cards in this Set

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 Density Property The property that states that because any two real numbers, there is always another real number Scale The ratio between two sets of measurements. (Example: 1 cm : 5 mi) Irrational NUmbers A number that cannot be expressed as a ratio of two integers or as a repeating or terminating decimal. Scale drawing A drawing that uses a scale to make an object smaller than or larger than the real object Rational NUmbers Any number that can be expressed as a ratio of two numbers. Similar Figures with the same shape but not neccaryly the same size Perfect square square of a whole number cross product THe product of numbers on the diagonal when comparing two ratios. Real number a rational or irrational numnber Unit price a unit rate used to compare prices reciprocal the upside down of a fraction unit rate a rate in which the second quantity in the caparison is one unit percent these are ratios that compare a number to 100 rate a ratio that compares 2 quantities measured in different units Percent change the ratio of the amount of change to the original amount proportion an equation that states the 2 ratios are equal commission a fee paid to a person who makes a sale equivalent ratio ratios that name the same comparison commission rate this is usually a percent of the selling price ratio a comparison of 2 quanities by division sales tax the tax on the sale of an item or service rate of interest the percent charged or earned on the principal withholding tax tax deducted from a person's earnings as an advance payment of income tax principal amount of money borrowed or invested simple interest the money you owe on an amount of money u borrowed algebracic expression an expression that contains at least one variable scientific notation a method of writing very large or very small numbers by using powers of 10 order of operations the rules to follow when evaluating an expression or equation exponential form a number is in this form when it is written with a base and an exponent evaluate means to solve base when a number is raised to a power, the number that is used as a factor is this assocaitive property the property that states that the grouping can change places but the sun or product stays the same absolute value the distance od a number from zero on a number line commmunative property the property that states the number can change places but the sum or product stays the same opposite the numbers that are = distance from zero on a number ine distrubutive property the property that states if you mulpitpy a sun by the number outside by inside integer the set whole numbers including 0 and their opposites exponent the number that indicates how many times the base is used as a factor factor numbers that are being multiplied together numerical expression an expression that contains only numbers and operations difference the answer to subtracting problem variable a letter or symbol that means a number quotient the answer to a division problem sum the answer to an addition problem product the answer to a multiplication problem