Alabama Learning Exchange
Alex: Rational or Irrational? That Is the Question
Students will participate in an activity that will help them obtain a feeling of how numbers are related to each other. They will determine whether a number is rational or irrational. Students will also be able to order rational and...
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Irrational Numbers
Find a quick, concise explanation of only irrational numbers. A diagram is given and clearly explained that shows how irrational numbers relate to other number groups.
Math Planet
Math Planet: Integers and Rational Numbers
Gain an understanding of integers and rational numbers by viewing an example and a video lesson.
Math Planet
Math Planet: Algebra 1: Integers and Rational Numbers
Provides an example and a video lesson that illustrates integers and rational numbers.
Khan Academy
Khan Academy: Comparing Irrational Numbers With a Calculator
Practice using a calculator to find the approximate decimal values of irrational numbers. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or receive hints.
Khan Academy
Khan Academy: Comparing Irrational Numbers
Practice comparing irrational numbers without using a calculator. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or receive hints.
Khan Academy
Khan Academy: Converting Repeating Decimals to Fractions 1
Practice converting 1- and 2-digit repeating decimals into fractions. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or receive hints.
Khan Academy
Khan Academy: Converting Multi Digit Repeating Decimals to Fractions
Practice converting multi-digit repeating decimals to fractions. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or receive hints.
Khan Academy
Khan Academy: Adding & Subtracting Rational Numbers
Practice adding and subtracting negative fractions, decimals, and percents. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Khan Academy
Khan Academy: Classify Numbers
Practice classifying numbers as whole, integer, rational, and irrational. Students receive immediate feedback and have the opportunity to try questions repeatedly, to watch a video, or ask for a hint.
Illustrative Mathematics
Illustrative Mathematics: N Rn: Rational or Irrational?
In each of the following problems, a number is given. If possible, determine whether the given number is rational or irrational. In some cases, it may be impossible to determine whether the given number is rational or irrational. Justify...
Illustrative Mathematics
Illustrative Mathematics: 8.ns Converting Decimal Rational Numbers to Fractions
Eighth graders are presented with three repeating decimal numbers and must convert them to fraction format. Aligns with 8.NS.A.1.
Illustrative Mathematics
Illustrative Mathematics: 8.ns Converting Repeating Decimals to Fractions
The purpose of this task is to study some concrete examples of repeating decimals and find a way to convert them to fractions. Aligns with 8.NS.A.1.
Illustrative Mathematics
Illustrative Mathematics: 8.ns Identifying Rational Numbers
For this task, 8th graders are presented with a mixed set of eight different numbers and must identify them as rational or irrational and explain how they know. Aligns with 8.NS.A.1.
Math Open Reference
Math Open Reference: Reciprocal
Learn about reciprocals with this site which offers detailed explanations and multiple examples. Topics covered include how to find a reciprocal of a fraction, number, or decimal.
CK-12 Foundation
Ck 12: Arithmetic: Multiplication of Rational Numbers
[Free Registration/Login may be required to access all resource tools.] Learn how to multiply rational numbers. Includes examples, videos, and practice questions.
Integrated Publishing
Integrated Publishing: Rational and Irrational Numbers
Content, suitable for an introductory algebra course, explains the difference between rational and irrational numbers, how to rationalize the denominator, how to evaluate radicals and the square root process. Practice problems included.
Alabama Learning Exchange
Alex: Those Number Aren't Just Moody.
Rational numbers can sometimes cause problems when they're converted to repeating decimals. That, we can handle. But, what about those irrational numbers that can only be "sort of, like approximated"? How can we expect middle schoolers...
CK-12 Foundation
Ck 12: Algebra: Basics of Real Numbers Study Guide
This comprehensive study guide highlights the main terms and formulas needed to understand the basics of real numbers. Examples are included.
Cuemath
Cuemath: Irrational Numbers
Learn how to identify irrational numbers. This lesson reviews the irrational number list, the difference between irrational and rational numbers, and whether or not irrational numbers are real numbers. Examples are provided along with a...
Cuemath
Cuemath: Rational Numbers
This lesson defines rational numbers and teaches you how to identify them. A handy chart is provided that shows the difference between irrational and rational numbers.
Quia
Ixl Learning: Irrational Numbers
Brush up on your math skills relating to irrational numbers then try some practice problems to test your understanding.
PBS
Pbs Learning Media: Logical Leaps: Rational Numbers on the Number Line
In this interactive, use logic to solve riddles involving a wallaby jumping contest. Then, place each contestant's jump -- a fraction, mixed number, or decimal between -5 and +5 -- at the correct point on the number line. Backward jumps...
Wikimedia
Wikipedia: Irrational Number
At this site from Wikipedia you can learn the definition of an irrational number, then look at examples and explanations of why some numbers are irrational and others are not.