What is the definition of subtraction when dealing with negatives? The short video provides the definition of subtraction. Scholars observe as the presenter applies the definition to examples with negative numbers.

Why can't mathematicians add just like they multiply fractions? The resource provides a counterexample to show that the same rules for multiplying fractions do not work for addition. Using the counterexample, learners see the proper way...

Investigate the claim that 999997=-3. Learners discover how to subtract large numbers using a quick method of addition. The video provides examples and shows how adding machines and computers apply this approach to subtraction.

PEMDAS is not all that it is cracked up to be. The short video provides an argument that the order of operations may not be instructionally sound. The presentation shows that understanding the concepts and properties of mathematics...

It is not good enough to have the same variable, they must have the same exponents too. The video introduces the class to like terms, while giving the definition of like terms and providing examples of combining like terms through addition.

Take the fear out of signed numbers. An educational video explains signed numbers as keeping the sign when both are the same, and offers tricks for what to do when one is positive and the other is negative.

Here is a video that adds visual context and a steady stream of step-by-step instructions for adding and subtracting negative integers, with the help of a number line.   

Understanding the inverse relationship between addition and subtraction is essential for developing fluency in young mathematicians. Zoe and RJ explain how three numbers can form fact families that make two addition and two subtraction...

Subtracting decimals is the same as subtracting numbers without decimal points. But wait, there is one key thing every kid needs to remember, you have to line up the decimals. How? Duane shows us how he lines up his numbers based on...

Duane draws a visual to show how to change a whole number into a fraction before subtracting.

A cute video on the basics of subtraction await! Efrin explains what subtraction is, what it isn't, and provides several simple examples of how subtraction works. A great video for younger learners just building a mathematical...

Ever wonder how to use an abacus? Take a step back from the electronics and learn the basic elements with this short video. A student from Annunciation Catholic School explains how to express a number on the abacus. Note: Dialogue may be...

You have an equation with an unknown variable and fractions. How do you solve this kind of equation? You can do it using the addition property of equality to first isolate the variable. Then, combine the fractions and since they have a...

Are your young mathematicians having trouble with subtracting mixed fractions? Consider this video to supplement your teaching. An instructor explains step-by-step how to subtract mixed fractions with unlike denominators showing viewers...

Combining fractions with unlike denominators. Wait! You can't do that! You have to have common denominators to combine the numerator of fractions. Here's a quick review of changing the denominator by multiplying each fraction by that...

It's not a complicated word problem, but the picture frame just gives the problem a little context. So you are trying to find the difference, which means subtraction. The instructor reviews how to distribute the negative sign to the...

A direct instructional video of how to solve an inequality when you have the same variable on both sides of the inequality sign, this resource could be used in class or at home.

Investigate inequalities with this instructional video. A lecturer presents an inequality that will take multiple steps to complete and works through the problem step-by-step, numbering and labeling each action she takes. This video is...

Approach inequalities in a new way with this video! This video gives step-by-step instruction on how to solve a two step inequality and then graph the answer. Learners could use this video as a reference as they do homework, or you might...

Looking for the range of a set of numbers? Well, that means you are looking for the difference between the largest value and the smallest value. So first, write the numbers in order from least to greatest. Then identify the largest value...

Word problems can be tricky. Lucky for you there are key words that can help you identify the operation needed to successfully complete any word problem. This tutorial helps you pick out key words and what those words indicate in terms...

Reinforce instruction on the least common denominator and subtracting rational expressions with this tutorial video. Learners can view this video in class or at home. Consider using this resource to supplement your lesson plan.

Rational expressions that are in the form of fractions. Yuk! The teacher demonstrates how to subtract one rational expression from the other when the expressions have a common denominator. Combine like terms and write it in simplest form.

Solve an equation that has fractions with common denominators. First step is to isolate the variable. In this equation, this can be done by using the subtraction property of equality. Now the variable is by itself but there are other...