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
CK-12 Foundation
Ck 12: Elem Math: Adding and Subtracting Missing Number
[Free Registration/Login may be required to access all resource tools.] The resource is a video showing students how to find a missing number in a multi-step addition and subtraction problem using inverse operations. Adaptive practice...
Clark University
Clark University: Dave's Short Trig Course
This Clark University trigonometry tutorial site features questions and answers about what students can learn from trigonometry.
Math Cats
Math Cat: Fact Family Card
Everything you need to know about fact families can be found here. Discover what fact families are and learn different strategies for using them. Links included to print your own fact family cards, create a fact family house, and play a...
CK-12 Foundation
Ck 12: Algebra: Single Variable Division Equations
[Free Registration/Login may be required to access all resource tools.] Solve single variable equations involving division by applying inverse operations.
Other
Technical Tutoring: Trigonometry: The Very Fast Review
This site is a quick review of the functions and identities in trigonometry. Very helpful site.
Other
University of Edinburgh: Glossary of Introductory Computer Graphics Terms
This website, from the University of Edinburgh, provides a lengthy glossary of computer graphics terms written by Olin Lathrop, author of "The Way Computer Graphics Work". This site provides simple definitions of basic terms; no graphics...
NumberNut
Number Nut: Comparing Operations
Combine all of your knowledge about the four basic operations in this lesson that focuses on comparing operations. Discover the relationship between of each operation and key vocabulary terms to build your number sense.