National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Irrational Numbers; Rational Square Roots
Dr. Math responds to how one can tell whether a number is rational or irrational. A proof is discussed in the response.
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Number Systems
Find a quick, concise explanation of Real Numbers. Other number systems are also defined such as: Natural, Integer, Rational, Irrational and Complex Numbers.
Lawrence Hall of Science
The Math Page: Topics in Precalculus
Designed to help high school students to learn precalculus, topics include the formal rules of algebra, rational and irrational numbers and mathematical induction.
Texas Instruments
Texas Instruments: Rational Match
Students use the Rational Number Rampage application to play a game to find numbers that are equivalent fractions, decimals, and percents.
TED Talks
Ted: Ted Ed: A Brief History of Numerical Systems
1, 2, 3, 4, 5, 6, 7, 8, 9 and 0. With just these ten symbols, we can write any rational number imaginable. But why these particular symbols? Why ten of them? And why do we arrange them the way we do? Alessandra King gives a brief history...
Texas Instruments
Texas Instruments: Rational Timer
Students use the calculator to play a game that requires them to convert numbers to fractions, decimals, or percent quickly and accurately.
Khan Academy
Khan Academy: Rational Number Word Problems
Practice solving multi-step word problems. The numbers in these problems may be fractions, decimals, and percents. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Common Core Sheets
Common Core Sheets: The Number System 7.ns.1a Worksheets
Create a learning exercise to assess students understanding of adding and subtracting with negative and positive numbers.
Curated OER
Math Words: Rational Numbers
Mathwords provides a brief description with an easy to read chart that includes all types of real numbers.
CK-12 Foundation
Ck 12: Arithmetic: Sums of Integers on a Number Line
[Free Registration/Login may be required to access all resource tools.] In this lesson students find sums of integers by using a number line. Students examine guided notes, review guided practice, watch instructional videos and attempt...
CK-12 Foundation
Ck 12: Arithmetic: Sums of Integers on a Number Line
[Free Registration/Login may be required to access all resource tools.] In this lesson students find sums of integers by using a number line. Students examine guided notes, review guided practice, watch instructional videos and attempt...
Scholastic
Scholastic: Study Jams! Math: Numbers: Integers
This site provides great practice on the concept of integers. Students can first learn about the topic by watching a step by step instruction video that also points out areas of concern. Finally, students can practice their knowledge by...
Math Medics
S.o.s. Math: Algebra
This lesson provides basic instruction on the major concepts in algebra. Content includes a focus on fractions, units of conversion, complex numbers, quadratic equations, factorization and roots of polynomials, solving equations, systems...
ClassFlow
Class Flow: Irrational Numbers
[Free Registration/Login Required] Students are introduced to irrational numbers, and the application in various expressions.
Khan Academy
Khan Academy: Addition & Subtraction: Find the Missing Value
Practice finding the missing value in an addition or subtraction equation involving negative numbers. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
CK-12 Foundation
Ck 12: Algebra: Sets and Symbols
[Free Registration/Login may be required to access all resource tools.] Classify real numbers as rational numbers, whole numbers, integers, and irrational numbers.
CK-12 Foundation
Ck 12: Arithmetic: Conversion of Decimals, Fractions, and Percent
[Free Registration/Login may be required to access all resource tools.] Understand, identify and find equivalent forms of rational numbers
Doina Popovici
Math Play: Rational and Irrational Numbers Game
An interactive game where students have to determine whether a number is a rational or a irrational number.
University of St. Andrews (UK)
University of St. Andrews: Georg Ferdinand Cantor
This site, which is provided for by the University of St. Andrews, gives information on the German mathematician Cantor.
ClassFlow
Class Flow: Rounding
[Free Registration/Login Required] In this flipchart, students apply estimation strategies to predict or determine the reasonableness of answers in situations involving computation on rational numbers in various forms including whole...
ClassFlow
Class Flow: Number Theory Order of Operations
[Free Registration/Login Required] This flipchart will help students understand the order of arithmetic operations with rational numbers. It includes exercises and assessment questions.
Doina Popovici
Math Play: 8th Grade Halloween Math Game
An online game where students destroy spooky monsters by answering questions that have them writing rational numbers as decimals and decimals as fractions.
University of Utah
University of Utah: The Number System
This site from The University of Utah provides a definition of commonly used numbers including rational numbers, natural numbers, integers, real and complex numbers and more.
Other popular searches
- Ordering Rational Numbers
- Compare Rational Numbers
- Multiplying Rational Numbers
- Comparing Rational Numbers
- Dividing Rational Numbers
- Negative Rational Numbers
- Rational Numbers Equations
- Properties of Rational Numbers
- Adding Rational Numbers
- Classifying Numbers Rational
- Order Rational Numbers
- Using Rational Numbers