Understanding Rational Numbers
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Beginner
Start here! Easy to understand
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Beginner Explanation
A rational number is any number that can be written as a ratio of two integers <a href="fractions">$\frac{a}{b}$</a> where $b \neq 0$. For example, $\frac{1}{2}$, $\frac{3}{4}$, and $-\frac{5}{2}$ are all rational numbers because they come from dividing one integer by another.
Practice Problems
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1
Quick Quiz
Single Choice Quiz
Beginner
Which of the following is a rational number? $\sqrt{2}$, $\frac{3}{4}$, $\pi$, $\sqrt{5}$
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2
Real-World Problem
Question Exercise
Intermediate
Teenager Scenario
Jessica wants to share a pizza equally with her 4 friends. How can she express this in terms of rational numbers?
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3
Thinking Challenge
Thinking Exercise
Intermediate
Think About This
Imagine a number line like this: … -1 --- 0 --- 1 --- 2 … Can a rational number be positioned precisely on it? Explain why or why not.
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4
Challenge Quiz
Single Choice Quiz
Advanced
Which decimal can be expressed as a rational number? $0.\overline{3}$, $\pi$, $e$, $\sqrt{7}$
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Recap
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