<img src="https://d5nxst8fruw4z.cloudfront.net/atrk.gif?account=iA1Pi1a8Dy00ym" style="display:none" height="1" width="1" alt="" />

# Mental Math for Addition and Subtraction Equations

## Solve simple addition/subtraction equations mentally.

Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.
• Video

## Solve One Step Equations by Adding and Subtracting Whole Numbers

by CK-12 //basic

Provides examples of how to solve one step equations by adding and subtracting with the variable on the left side of the equations.

0
• Video

## Solving One Step Equations: The Basic

by CK-12 //basic

Learn how to solve a basic one step equation.

5