Videos and lessons to help High School students explain why the sum or product of two rational numbers is rational; that the sum of a rational number and an irrational number is irrational; and that the product of a non-zero rational number and an irrational number is irrational.

- Simplify radical expressions.
- Add, subtract, and multiply real numbers.
- Explain why adding and multiplying two rational numbers results in a rational number.
- Explain why adding a rational number to an irrational number results in an irrational number.
- Explain why multiplying a nonzero number to an irrational number results in an irrational number.

**Rational + Rational = Rational
Rational + Irrational = Irrational
Irrational + Irrational = Irrational
Rational × Rational = Rational
Rational × Irrational = Irrational
Irrational × Irrational = Rational or Irrational
**

Common Core: HSN-RN.B.3

Related Topics:

Common Core (The Real Number System)

Common Core for Mathematics

Rational vs. Irrational Numbers

This video explains the difference between rational and irrational numbers and how to identify rational and irrational numbers.

Irrational Numbers

Although the Greeks initially thought all numeric qualtities could be represented by the ratio of two integers, i.e. rational numbers, we now know that not all numbers are rational. How do we know this.

Adding Rational and Irrational Numbers

Rational + Rational = Rational

Rational + Irrational = Irrational.

Product & quotient of 2 rationals, 2 irrationals or 1 of each

Rational × Rational = Rational

Rational × Irrational = Irrational

Irrational × Irrational = Rational or Irrational

Rational ÷ Rational = Rational

Rational ÷ Irrational = Irrational

Irrational ÷ Irrational = Rational or Irrational

Sums and products of rationals and irrationals - Song

This is a song that teaches about adding and multiplying rational numbers and irrational numbers. The song lines up with the following high school common core standard : CCSS.Math.Content.HSN-RN.B.3

Rational + Rational = Rational

Rational + Irrational = Irrational

Rational × Rational = Rational

Rational × Irrational = Irrational

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