Sal of Khan Academy offers an overview of all of the videos in the Khan Academy Library. If you're a little overwhelmed by how many math tutorials he has to offer, this general review is a great way to find the right place for you to start your studies. Continue …

# Math Videos

## Inequalities Using Addition and Subtraction

Sal of Khan Academy explains how to understand inequalities using addition and subtraction. Get some great examples of how to approach and solve inequalities using this technique. Continue …

## Subtracting Mixed Numbers Word Problem

Sal of Khan Academy explains how to simplify word problems to the basic numerical question. Get practice both with understanding these word problems and subtracting and simplifying mixed numbers. Continue …

## More on Unit Vector Notation

Sal from Khan Academy reveals that adding the x and y components of two vectors is equivalent to adding the vectors visually using the head-to-tail method. This followup video offers a second way to approach vector notation. Continue …

## Addition and Subtraction with Significant Figures

Sal from Khan academy explains how to add and subtract with the right level of precision when dealing with decimals. Learn what significant figures are and how to put the correct number of places after a decimal point. Continue …

## Complex Numbers

Sal from Khan Academy offers an introduction to complex numbers and the imaginary i. Learn how to add, subtract, and multiply imaginary and real numbers. Continue …

## Adding and Subtracting Polynomials 3

Sal from Khan Academy tackles more difficult examples of adding and subtracting polynomials. This more challenging set of problems will push your understanding of polynomials and make you an expert in no time. Continue …

## Decimal Place Value

Sal from Khan Academy explains how to find the place value of a digit within a number that contains a decimal point. After this explanation, you'll understand how to tell the difference between the tenths, hundreths, and thousandths place with ease. Continue …

## Partial Fraction Expansion 3

Sal of Khan Academy covers more partial fraction expansion problems to show you another type of situation you may encounter. This problems deals with repeated factors, and Sal's helpful explanation will make you ready to tackle any decomposition problem. Continue …

## Adding Fractions with Like Denominators

Sal of Khan Academy demonstrates how to add fractions that have the same denominator. After his explanation of the concept behind fractions, you'll realize it's not any more difficult than regular addition! Continue …