Solving an Equation by Multiplying
An explanation of how to solve an algebraic equation by adding.
Multiplying Whole Numbers, Part 3: Multiplying a Larger Number by a Single-Digit Number
This clip presents a simple multiplication problem in which a three-digit number is multiplied by a one-digit number. The clip explains that multiplication is essentially a shortcut for what would otherwise be a very laborious addition problem, then...
Summary of the Order of Operations and Use of Parentheses in Algebra
The standard order of operations and the use of parentheses in Algebra are summarized.
Rules for Subtracting Algebraic Expressions
Rules for subtracting one algebraic expression from another and a step-by-step demonstration.
Solving Systems of Equations Using the Elimination Method by Adding
Explanation of the elimination method of solving a system of equations. Adding the equations to eliminate a variable is quicker than using the substitution method, but requires that both equations be in the same form and that the system contain an a...
Multiplying Whole Numbers, Part 1: Introduction to Multiplication: Factors and Products
This clip explains that multiplication is "a shortcut for addition." It also introduces the concept of factors, and states that the answer in a multiplication problem is known as the "product."
Four Basic Tactics for Equations
A summary of the four basic tactics for solving equations.
Review of Equation-Solving Strategies
Review of three strategies for solving equations.
Identities for Addition and Multiplication
Two important laws for solving equations are the identities for addition and multiplication.
Identity for Addition
The identity for addition is zero. It works for all numbers and for the variables used in algebra.