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1-10: Compare Real Numbers What are Rational Numbers ? What are Irrational Numbers ? What are Numbers ? -2.5, -12 78 , and 3.76 √2 ≈ 1.414213562. π A rational number is a number that can be expressed as the ratio ab , where a and b are integers and b ≠ 0. A irrational number is a number that cannot be expressed as the ratio ab , where a and b are integers and b ≠ 0. Real See Page 90: The Real Number chart The set of rational numbers and the set of irrational numbers together make up the set of real numbers . Example 1a: Page 90 Example 1c: How do I Compare and Order Real Numbers ? Example 2e: Page 91 Summary: Name all set of 1. List all numbers to which solutions. each real number belongs: √10 the √100 √7 2 23 Fill in each with <, > or = to make the statement true: √17 4.03 You can compare them by writing them in the same notation.