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**Joyce Waid Locust Fork High School**

The Real Number System Joyce Waid Locust Fork High School 08/12/11 jwaid

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The Real Number System The Real Number System is divided into two categories: Rational and Irrational. Rational Numbers: Numbers, such as ½ and –3/1 that can be written as a ratio of two integers. Irrational Numbers: Real numbers, such as square root of 2 or , that are not rational. 08/12/11 jwaid

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The Real Number System Rational Numbers: Includes integers, whole numbers, natural numbers, and numbers written as the ratio of two integers. Integers: {. . . – 3, – 2, – 1, 0, 1, 2, 3, . . .} Whole Numbers: {0, 1, 2, 3, . . .} Natural Numbers: {1, 2, 3, . . .} 08/12/11 jwaid

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**The Real Number System Real Numbers Rational Numbers**

Irrational Numbers 1/2 -2 2 3 3 2/3 5 2 3 4 15% -0.7 1.456 08/12/11 jwaid

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**The Real Number System Real Numbers Rational Numbers**

Irrational Numbers Integers 2 3 3 -2 1/2 2/3 5 2 3 4 - 0.7 15% 1.456 08/12/11 jwaid

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**The Real Number System Real Numbers Rational Numbers**

Irrational Numbers Integers Whole 2 3 1/2 3 2/3 5 2 3 4 -2 - 0.7 15% 1.456 08/12/11 jwaid

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**The Real Number System Real Numbers Rational Numbers**

Irrational Numbers Integers Whole 2 Natural 3 1/2 2/3 3 5 2 3 4 -2 - 0.7 15% 1.456 08/12/11 jwaid

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Section 2-8 Definitions Square root: = 6. Radical sign: This is a radical sign. Perfect square: 4, 9, 16, 25, … are perfect square numbers. Because 2*2=4,

Section 2-8 Definitions Square root: = 6. Radical sign: This is a radical sign. Perfect square: 4, 9, 16, 25, … are perfect square numbers. Because 2*2=4,

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