AAA Math
Aaa Math: Inverse Relationship of Addition & Subtraction
There is a great interactive problem set for students to practice the concept of the inverse property. This would be a great review before a unit on solving basic equations.
Primary Resources
Primary Resources: Addition and Subtraction Higher Numbers
An extensive selection of teacher resources to aide in teaching and reviewing addition and subtraction of two and three digit numbers, inverse operations, counting on, and other mental strategies for addition and subtraction. Resources...
Sophia Learning
Sophia: Inverse Operations
This video lesson introduces and provides examples of inverse operations. A short quiz follows to test students' understanding of the skill.
AAA Math
Aaa Math: Inverse Relationship of Subtraction and Addition
Students explore the inverse relationship of addition and subtraction. The resource provides self-check exercises and timed learning games to practice the concept.
Mangahigh
Mangahigh: Number: Use Inverses
Explore addition and subtraction and how they are related.
CK-12 Foundation
Ck 12: Algebra: Single Variable Addition Equations
[Free Registration/Login may be required to access all resource tools.] Solve single variable equations involving addition.
AAA Math
Aaa Math: Complete a Numerical Sentence Subtraction
Students can practice solving subtraction equations through these interactive learning exercises. Three games are also available to challenge students' understanding of the skill.
AAA Math
Aaa Math: Inverse Relationship of Addition and Subtraction
Explains the inverse relationship between addition and subtraction. Gives exercises and games to practice this skill.
CK-12 Foundation
Ck 12: Algebra: Inequalities With Addition and Subtraction
[Free Registration/Login may be required to access all resource tools.] Solve inequalities using addition or subtraction
CK-12 Foundation
Ck 12: Algebra: Single Variable Addition Equations
[Free Registration/Login may be required to access all resource tools.] Solve single variable addition equations
CK-12 Foundation
Ck 12: Algebra: Single Variable Subtraction Equations
[Free Registration/Login may be required to access all resource tools.] Solve single variable subtraction equations
CK-12 Foundation
Ck 12: Algebra: One Step Equations and Inverse Operations
[Free Registration/Login may be required to access all resource tools.] In this lesson students solve equations involving addition and subtraction. Students examine guided notes, review guided practice, watch instructional videos and...
Khan Academy
Khan Academy: Negative Number Addition and Subtraction: Word Problems
Practice solving word problems with 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: Arithmetic: Subtraction of Rational Numbers
[Free Registration/Login may be required to access all resource tools.] In this lesson, students learn how to subtract rational numbers. Students examine guided notes, review guided practice, watch instructional videos and attempt...
AAA Math
Aaa Math: Inverse Relationship of Addition and Subtraction
This site introduces addition and subtraction fact families and provides an opportunity for students to practice the skill.
Beacon Learning Center
Beacon Learning Center: Checking Subtraction
Students can explore the inverse relationship of addition and subtraction in this interactive web lesson.
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Inverse Operations
Find a quick, concise explanation of inverse operations as in addition and subtraction, multiplication and division, and to a certain extent exponents and logarithms. Examples are given and clearly explained.
Washington State University
Washington State University: Real Numbers
This site from Washington State University provides properties and rules of addition and multiplication that help with proofs.
ClassFlow
Class Flow: All in the Family: Fact Families
[Free Registration/Login Required] This flipchart explores the concept of fact families for addition and subtraction as well as inverse operations. There are several pages of hands on activities to engage student learning.
Texas Instruments
Texas Instruments: Matrices and Linear Equations
This Computer Algebra System (CAS) activity encourages students to investigate addition, subtraction, and multiplication of matrices. They find the inverse of a matrix. Students also solve a set of linear equations by using matrices.
Other
Sierra College: Elementary Algebra Review Sheet and Common Formulas
This review sheet includes important rules, properties, formulas, and equations needed to solve many Algebra problems.
Massachusetts Institute of Technology
Mit: Useful Trigonometric Identities
This list of trigonometric identities includes the factoring formulas near the bottom. A great tool for reference.
Texas A&M University
Wtamu Virtual Math Lab: Intermediate Algebra
This site is a tutorial for students in algebra 2 or for those who need a refresher. The site has explanations, definitions, examples, practice problems and practice tests are found covering topics such as linear equations, graphing,...
Illustrative Mathematics
Illustrative Mathematics: 4.oa Comparing Growth, Variation 1
The purpose of this task is to foster a classroom discussion that will highlight the difference between multiplicative and additive reasoning. Aligns with CCSS.Math.Content.4.OA.A.1 Interpret a multiplication equation as a comparison