Calculator Soup
Calculator Soup: Lcd Calculator Least Common Denominator
Use this Least Common Denominator Calculator to find the lowest common denominator (LCD) of fractions, integers and mixed numbers. Finding the LCD is important because fractions need to have the same denominator when you are doing...
Khan Academy
Khan Academy: Equivalent Expressions With Negative Numbers
Practice identifying equivalent expressions involving the addition and subtraction of negative numbers. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Khan Academy
Khan Academy: Substitution With Negative Numbers
Practice plugging in values to evaluate negative number addition and subtraction expressions. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Khan Academy
Khan Academy: Adding & Subtracting Negative Numbers
Practice solving addition and subtraction problems with integers (positive and negative numbers).
Interactive Mathematics
Interactive Mathematics: Add and Subtract Algebraic Expressions
Information is given on how to add and subtract algebraic expressions. Also included is information on terms, coefficients, and like terms, as well as examples to demonstrate how to simplify.
BBC
Bbc: Bitesize Revision: Negative Numbers
You can learn to recognize negative numbers and do simple computation with negative numbers. The explanations are short, simple and clear. There is even a test to check your introductory skills.
Ministerio de Educación (Spain)
Ministerio De Educacion: Conecto Con Las Mates
These are five interactive units for Elementary math. Each unit is structured in four parts: explanation, activities, dictionary and assessment.
That Quiz
That Quiz
ThatQuiz is an excellent assessment tool for teachers and students. At this site, teachers can create individualized or group assessments on a variety of math topics. Students take these practice assessments directly online and receive...