CK-12 Foundation
Ck 12: Real Numbers: Adding Electrons
[Free Registration/Login Required] Students explore real numbers through electrons and protons. Click challenge me to answer practice questions and click learn more to complete a learning module on real numbers.
Common Core Sheets
Common Core Sheets: Comparing Numbers
Create a worksheet to assess students knowledge of comparing numbers.
McGraw Hill
Glencoe: Self Check Quizzes 3 Add and Subtract Fractions With Unlike Denominator
Use Glencoe's Math Course 3 randomly generated self-checking quiz to test your knowledge of adding and subtracting fractions with unlike denominators. Each question has a "Hint" link to help. Choose the correct answer for each problem....
McGraw Hill
Glencoe: Self Check Quizzes 3 Add and Subtract Fractions With Like Denominators
Use Glencoe's Math Course 3 randomly generated self-checking quiz to test your knowledge of adding and subtracting fractions with like denominators. Each question has a "Hint" link to help. Choose the correct answer for each problem. At...
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Definitions of Rational, Irrational
Math Forum definition and explanation of rational and irrational numbers, the definitions of mathematics is also addressed.
ClassFlow
Class Flow: Rational and Irrational Numbers
[Free Registration/Login Required] By the end of the lesson, students will classify numbers into number families to help understand how to distinguish the difference between rational and irrational numbers. Students will demonstrate this...
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Rational / Irrational Numbers
Math Forum response providing methods to prove that between any two numbers there exist a rational and an irrational number.
Curated OER
Clip Art by Phillip Martin: Rational Numbers
A clipart illustration by Phillip Martin titled "Rational Numbers."
Lawrence Hall of Science
The Math Page: Skill in Algebra: Radicals: Rationals & Irrationals
Here is a site that clearly and thoroughly explains many topics related to radicals. There are example problems solved, problems for the student to attempt, and answers to the student problems. Point this site out to students who have...
Common Core Sheets
Common Core Sheets: The Number System 7.ns.1d Worksheets
Print or create worksheets or flashcards to assess students' understanding of adding or subtracting rational numbers.
Khan Academy
Khan Academy: Add & Subtract Rational Expressions
Example: Subtract and simplify (a-2)/(a+2) - (a-3)/(a^2+4a+4).
Khan Academy
Khan Academy: Add & Subtract Rational Expressions: Like Denominators
Example: Add and simplify 6/(2x^2-7) + (-3x-8)/(2x^2-7).
Khan Academy
Khan Academy: Add & Subtract Rational Expressions: Factored Denominators
Example: Add and simplify x/(2x+1)(x-7) + 2x^2/(2x-3)(x-7).
CK-12 Foundation
Ck 12: Arithmetic: Comparison of Fractions, Decimals, and Percents
[Free Registration/Login may be required to access all resource tools.] Compare and order rational numbers
Education Place
Houghton Mifflin: Eduplace: Extra Practice Quiz Solve Equations W/rationals
Practice solving equations with rational numbers in them. Read the interactive quiz rules and then click on the "Begin" ticket. If you answer incorrectly you get one more chance to try again then you are told the correct answer. See how...
Khan Academy
Khan Academy: Absolute Value to Find Distance
Practice taking the absolute value of the difference of two numbers to find the distance between those numbers. Apply this principle to solve word problems. Students receive immediate feedback and have the opportunity to try questions...
CK-12 Foundation
Ck 12: Arithmetic: Repeating Decimals
[Free Registration/Login may be required to access all resource tools.] In this lesson students write fractions and mixed numbers as repeating decimals. Students examine guided notes, review guided practice, watch instructional videos...
Alabama Learning Exchange
Alex: Calm and Erratic!
During this lesson, students will learn why numbers are rational or irrational. Rational numbers are numbers that can be written in the form a/b. Irrational numbers cannot be expressed in the form a/b, where a and b are integers.
Help Algebra
Help algebra.com: The Real Number System
Natural numbers, whole numbers, integers and rational numbers begin this lesson on the real number system. You can also learn more about the number line and absolute value. Examples and diagrams are included to enhance understanding.
PBS
Pbs Learning Media: Pearl Diver
Play a fast-paced video game that involves finding rational numbers on the number line. This game from Math Snacks focuses on using what you know about positive and negative numbers and fractions to place them correctly on the variable...
PBS
Pbs: Building a Number Line
Recall the definitions of four different sets of numbers. This interactive illustration focuses on displaying counting numbers, integers, rational numbers, and real numbers on a number line, providing the opportunity to visualize number...
Texas Instruments
Texas Instruments: Comparing and Ordering
In this activity, students can use a number line to locate and compare rational numbers.
Illustrative Mathematics
Illustrative Mathematics: 7.ns, 7.ee Bookstore Account
In this lesson plan, 7th graders add and subtract rational numbers to solve word problems.
Illustrative Mathematics
Illustrative Mathematics: 7.ns Distances on the Number Line 2
In this lesson, 7th graders add and subtract rational numbers on a number line.
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