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### 17 Cards in this Set

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 algebra a mathematical language that uses symbols, ususally letters, along with numbers. The letters stand for numbers that are unknown. algebraic expression A combination of variables, numbers, and at least one operation. base In a power, the number used as a factor. In 10(3), the base is 10. (10 x 10 x 10) clustering An estimation method in which a group of numbers close in value are rounded to the same number. compare <, >, or = compatible numbers Numbers that are easy to divide mentally. composite numbers A number greater than 1 with more than two factors. cubed The product in which a number is a factor three times. Two cubed is 8 because 2 x 2 x 2 = 8. equation A mathematical sentence that contains an equals sign (=). equivalent is equal to evaluate To find the value of an algebraic expression by replacing variables with numbers. exponent In a power, the number of times the base is used as a factor. In 5(3), the exponet is 3. That is, 5(3) = 5 x 5 x 5. factor A number that divides into a whole number with a remainder of zero. greatest common factor (GCF) The greatest of the common factors of two or more numbers. The GCF of 24 and 30 is 6. integer The whole numbers and their opposites . . . . -3, -2, -1, 0, 1, 2, 3 . . . inverse operation Operations which undo each other. For example, addition and subtraction are inverse operations. least common multiple (LCM) The least of the common multiples of two or more numbers. The LCM of 2 and 3 is 6.