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

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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


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SLIDE 1

DAY 141 – UNDERSTANDING CLOSURE WITH RATIONAL NUMBERS

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SLIDE 2

Identify the sum of product as rational or irrational.

  • a. 5 + 8

rational / irrational

  • b. 16 ∗

81 rational / irrational

EXAMPLE 1

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SLIDE 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.

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SLIDE 4
  • b. 16 = 4 𝑏𝑜𝑒

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