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Goal 1.01 Vocabulary H J MacDonald Middle 8 th Grade Math Littleton

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Terminating Decimal A decimal that ends with a specific digit Examples: 2.6 5.3566 0.003

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Repeating Decimal A decimal with one or more repeating digit Examples: 0.33333………or 0.3 2.77777………or 2.7 37.121212……..or 37.12 8.66666………or 8.6

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Non-terminating Decimal A decimal that does not end or repeat Examples: = Approximately 3.14159265358979323846……… √5 = Approximately 2.236067976………

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Non-repeating Decimal A decimal that does not repeat Examples: = Approximately 3.14159265358979323846……… 2.13133133313333………

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Real Numbers All numbers on the number line. Includes all rational and irrational numbers. Positive or negative, large or small, whole numbers or decimal numbers, roots and pi are all Real Numbers.

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Rational Number Any number that can be made by dividing one integer by another. The word comes from "ratio". Examples: 1/2 is a rational number (1 divided by 2, or the ratio of 1 to 2) 0.75 is a rational number (3/4) 1 is a rational number (1/1) 2 is a rational number (2/1) 2.12 is a rational number (212/100) -6.6 is a rational number (-66/10)

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Irrational Number A number that cannot be written as a simple fraction - the decimal goes on forever without repeating. Example: is an irrational number √5 is an irrational number

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Integer A number with no fractional part. Includes the counting numbers {1,2,3,…}, zero {0}, and the negative of the counting numbers {-1, -2, -3, …} You can write them down like this: {…, - 3, -2, -1, 0, 1, 2, 3, …} Examples of integers: -16, -3, 0, 1, 198

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Whole Number The numbers {0, 1, 2, 3, …} etc. There is no fractional or decimal part. And no negatives. Examples: 5, 49 and 980 are all whole numbers.

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Natural Number The whole numbers from 1 upwards: 1, 2, 3, and so on …. No negative numbers and no fractions

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Radical An expression that has a square root, cube root, etc. The symbol is √

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Radicand The number under the (radical) symbol. radical That is, a number having its square root taken (or cube root, 4th root, 5th root, nth root, etc.). square rootcube rootnth rootsquare rootcube rootnth root For example, 3 is the radicand in √3.

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Square Root A nonnegative number that must be multiplied times itself to equal a given number. The square root of x is written √x. nonnegative numbernonnegative number

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Perfect Square Any number that is the square of a rational number. For example, 0, 1, 4, 9, 16, 25, etc. are all perfect squares. So are 1/4 and 1/9. rational number rational number

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Hypotenuse The hypotenuse is the longest side of a right triangle. The side opposite the right angle in a right-angled triangle

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