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Common Core Sheets
Common Core Sheets: Finding Opposites [Pdf]
This site provides worksheets covering the concept of finding opposites also know as additive inverses. There are ten worksheets and each has an answer key. All files are grouped together as a pdf file.
University of South Florida
Educational Technology Clearinghouse: Lit2 Go: Lewis Carroll: Symbolic Logic
The text of a book "discussing the area of mathematics which studies the purely formal properties of strings of symbols." The text can be read online or downloaded by individual chapters in MP3 or PDF format. In addition, each chapter...
Khan Academy
Khan Academy: Patterns in Multiplication Tables
Practice discovering and explaining patterns in multiplication tables. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints. CCSS.Math.Content.3.OA.D.9 Identify...
Duke University
Duke University: Web Feats Ii: Altitude Theorem for Equilateral Triangles
This resource provides information about the altitude theorem for equilateral triangles, in addition to links on related topics. Requires Java.
McGraw Hill
Mc Graw Hill: The Additive Inverse Property
The sum of any number and its additive inverse is always a zero. This site gives you the rule for this property.
Other
Algebra.com: Solution: Given a System of Two Equations in Two Variables
This activity shows an example of how to solve a system of equations using elimination. Each step is explained in detail. Additional links are provided for more information on properties of equality, solving equations, and solving a...
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Opposites
Find a quick, concise explanation of the property of opposites. Several examples are given and clearly explained.
University of Saskatchewan (Canada)
University of Saskatchewan: Inequalities
This University of Saskatchewan looks at the basic rules of solving inequalities, concentrating on inequalities with absolute values. Includes example problems and exercises with their solutions.
Illustrative Mathematics
Illustrative Mathematics: G Mg Solar Eclipse
In this task, young scholars investigate why total solar eclipses are rare. They will learn that, in addition to requiring the positioning of the Sun, Moon, and Earth, the Moon can only completely block out the Sun when it is closest to...
Better Lesson
Better Lesson: Introduction to Solving Equations
Sixth graders work with the concept of equality and balance to solve one and two-step algebraic equations.
Science Struck
Science Struck: Adding Exponents
Explains how to add exponents as well as other aspects of exponents including positive and negative exponents, rational exponents, zero exponents, power of power, and division of exponents. Includes practice problems with answers provided.
Washington State University
Washington State University: Order of Operations
Washington State University provides a short lesson concerning which operations to execute first in solving an equation. The site provides the answers with an example.
Khan Academy
Khan Academy: Equivalent Expressions With Negative Numbers and Variables
Practice equivalent expressions with negative numbers and variables.
TeachEngineering
Teach Engineering: Surface Tension Lab
Students extend their understanding of surface tension by exploring the real-world engineering problem of deciding what makes a "good" soap bubble. Student teams first measure this property, and then use this measurement to determine the...
Khan Academy
Khan Academy: Intro to Zero Matrices
Explains what a zero matrix is, shows examples, and provides some interactive practice exercises. Help is available for exercises if it is needed. A summary chart compares the number zero to the zero matrix.
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