Solving Equations With Mental Math

What are the Commutative Properties of Addition and Multiplication?

The commutative property is a fundamental building block of math, but it only works for addition and multiplication. This tutorial defines the commutative property and provides examples of how to use it.
What are the Identity Properties of Addition and Multiplication?

Let's identify an identity! Addition and subtraction have a different identity than multiplication and division. Learn about each of these identities with this tutorial!
What are the Associative Properties of Addition and Multiplication?

The associative property is one of those fundamental properties of math that make math work. You probably take this property for granted because it's so ingrained, but it's important to see how the guts of math work, so check out the tutorial and make sure you're solid on your fundamentals!
How Do You Find a Value to Make an Open Sentence True?

Solving open sentences can be fun! Follow along with this tutorial to see how to find the values that make an open sentence true!
What is an Open Sentence?

Understanding open sentences is a stepping stone for understanding more complex math problems. This tutorials introduces open sentences and gives you an example of how to solve one!