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**EXAMPLE 3 Classify numbers**

Tell whether each of the following numbers is a real number, a rational number, an irrational number, an integer, or a whole number: , , – 24 81 100 No Yes Real Number? Whole Number? Integer? Irrational Number? Rational Number? Number 24 100 – 81

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EXAMPLE 4 Graph and order real numbers , Order the numbers from least to greatest: 4 3 – 5 13 –2.5 9 . SOLUTION Begin by graphing the numbers on a number line. 4 3 ANSWER Read the numbers from left to right: –2.5, – 5 9 13 . ,

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EXAMPLE 4 GUIDED PRACTICE Graph and order real numbers for Examples 3 and 4 Tell whether each of the following numbers is a real number, a rational number, an irrational number, an integer, or a whole number: , 5.2, 0, , 4.1, Then order the numbers from least to greatest. 9. 7 9 2 – – 20 9 2 – , 7 20 4.1 5.2. ANSWER

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**Graph and order real numbers for Examples 3 and 4**

GUIDED PRACTICE Graph and order real numbers for Examples 3 and 4 No Yes Real Number? Whole Number? Integer? Irrational Number? Rational Number? Number 20 7 9 2 4.1 – 5.2

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