Math.com: Equations and Inequalities: Addition & Subtraction Equations

Systems of equations and inequalities model contextual situations. A set of 12 lessons build a solid understanding of writing and solving systems of equations and inequalities using a variety of methods. The module is the fifth in a...

Sometimes, equality just doesn't happen. Scholars apply their knowledge of solving equations to identify values that satisfy inequalities in the 34th installment of a 36-part module. They test given sets of numbers to find those that are...

Compare graphing an inequality in one variable on a number line to graphing an inequality in two variables on a coordinate plane. Young mathematicians work on a puzzle matching inequalities and their solutions. They then complete a...

Several problems involving inequalities and defining the variables are a piece of cake for Sal, and they will be to your Algebra pupils as well after they watch this video. Sal's careful explanation and explicit annotations are key to...

What is the best method to overcome negativity? Remember your absolute value! An informative video starts with an explanation of what absolute value is and its connection to measurement. It goes on to solve sample problems to help...

Add and subtract to keep an equation in balance. With the assistance of a balance, the video explains the process of solving an equation. The presentation details how to solve equations that involve addition and subtraction.

Systematically combine shapes to arrive at one solution. The resource models a system of linear equations using colored shapes. Pupils follow rules to combine circles and squares to add the two equations together, resulting in one...

Eliminate a color by dragging shapes. The interactive provides a graphical color display that allows for pupils to solve a linear system by elimination. Learners combine figures following set rules for positive and negative shapes. The...

Cover it up to reveal the values of variables. Using arrangements of colored tiles representing algebraic expressions, pupils layer them over each other to determine the values of variables. The procedure models the elimination method in...

Zoe is decorating a cake for her grandpa's birthday and needs to know how many more candles to add. Follow along as she explains how to set up and solve algebraic equations in this step-by-step presentation. Equations with negative...