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E XAMPLE 1 Identify the sum of product as rational or irrational. a. - PowerPoint PPT Presentation

D AY 141 U NDERSTANDING C LOSURE WITH R ATIONAL N UMBERS E XAMPLE 1 Identify the sum of product as rational or irrational. a. 5 + 8 rational / irrational b. 16 rational / irrational 81 A rational number can be written as a ration of


  1. D AY 141 – U NDERSTANDING C LOSURE WITH R ATIONAL N UMBERS

  2. E XAMPLE 1 Identify the sum of product as rational or irrational. a. 5 + 8 rational / irrational b. 16 ∗ rational / irrational 81

  3. A rational number can be written as a ration of two numbers. Irrational numbers can’t be written as a simple fraction. a. 5 = 2.2360 = ? ? (no ratio) this I irrational and 8 is rational. When adding a rational number to an irrational, the sum is irrational. So the answer is irrational.

  4. b. 16 = 4 𝑏𝑜𝑒 81 = 9 . Both are rational numbers. The product of two rational numbers is rational number. 4 ∗ 9 = 36 𝑠𝑏𝑢𝑗𝑝 1 This is rational value.

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