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Published bySara Robbins Modified over 5 years ago

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REAL NUMBERS (as opposed to fake numbers?)

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Two Kinds of Real Numbers Rational Numbers Irrational Numbers

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Rational Numbers A rational number is a real number that can be written as a ratio of two integers. A rational number written in decimal form is terminating or repeating.

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Examples of Rational Numbers 16 1/2 3.56 -8 1.3333… - 3/4

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Irrational Numbers An irrational number is a number that cannot be written as a ratio of two integers. Irrational numbers written as decimals are non-terminating and non-repeating.

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Examples of Irrational Numbers Square roots of non-perfect “squares” Pi 17

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Whole Numbers Whole numbers are counting numbers and zero For example: 0,1,2,3,4,5,6,7,8,9,10…

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Integers One of the subsets of rational numbers

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What are integers? Integers are the whole numbers and their opposites. Examples of integers are 6 -12 0 186 -934

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Whole numbers and Integers are rational numbers because they can be written as fraction with 1 as the denominator.

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Irrational Numbers Rational numbers are NOT irrational numbers. The best way to learn about irrational numbers is to get familiar with some of them. (Sorting Activity)

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