ClassFlow
Class Flow: Solving Equations: Addition and Place Value
[Free Registration/Login Required] This is a very interactive lesson to teach the students how to solve equations and word problems using the addition properties. The lesson includes Activote questions and student interaction.
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Properties of Addition
Find a quick, concise explanation of the properties of addition. Examples are given and clearly explained for each property.