The Number System

More Specific Topics in The Number System

Popular Tutorials in The Number System

What are Multiplicative Inverses?

Multiplicative inverses. That's a mouthful! Really, this term just refers to numbers that when multiplied together equal 1. These numbers are also called reciprocals of each other! Learn about multiplicative inverses by watching this tutorial.
How Do You Do Long Division?

We know that calculators are everywhere, but that doesn't mean that long division isn't important! Sometimes you won't be allowed to use a calculator, and when those times occur, you'll be thankful that you watched this video!
What's a Dividend and What's a Divisor?

When you do division problems, you need to know the vocabulary that people use to describe what number is being divided, and what number is doing the dividing. This tutorial will help you keep that vocabulary straight!
How Do You Do Long Division with Decimals?

We know that calculators are everywhere, but that doesn't mean that long division isn't important! Sometimes you won't be allowed to use a calculator, and when those times occur, you'll be thankful that you watched this video!
What's an Inequality?

Inequalities come up all the time when you're working algebra problems. In this tutorial you'll learn what an inequality is, and you'll see all the common inequality symbols that you're likely to see :)
What Does Absolute Value Mean?

In this tutorial you'll see how you can think of absolute value in a very intuitive way. Let us know if you have any questions about it!
How Do You Name a Set That's Graphed on a Number Line?

If you have ever stared at a number line with dots on it and wondered 'How could I summarize these dots?', then this is the tutorial for you!
How Do You Graph a Set on a Number Line?

Number lines are great ways to represent a group of numbers, and in this tutorial you'll see how to graph a group of numbers on a number line
What's the Reciprocal Rule of Division?

When you divide fractions, the trick is to rewrite division as a multiplication. But the truth is that you can always rewrite division as a multiplication, and in this tutorial you'll see the rule that makes that possible!
What's a Reciprocal?

Reciprocals are important when it comes to dividing fractions, finding perpendicular lines, dealing with inverse proportions, and so much more! In this tutorial you can review the basics about reciprocals.
How Do You Solve a Word Problem Where You Divide Fractions?

Working with word problems AND fractions? This tutorial shows you how to take a word problem and translate it into a mathematical equation involving a complex fraction. Then, you'll see how to simplify the complex fraction to get the answer. Check it out!
How Do You Find the Greatest Common Factor of Two Numbers Using Prime Factorization?

This tutorial uses something called a factor tree to find the greatest common factor of two numbers. Creating a factor tree for a number makes it easier to find its prime factors. These prime factors are used to help find the greatest common factor. Watch this tutorial and learn how to find the greatest common factor using a factor tree.
How Do You Subtract Decimals?

Doing math with paper and pencil can come in real handy, so make sure you're comfortable subtracting decimals by hand. After all, you don't want the calculator to be a crutch!
How Do You Add Decimals?

Doing math with paper and pencil can come in real handy, so make sure you're comfortable adding decimals by hand. After all, you don't want the calculator to be a crutch!
How Do You Multiply Decimals?

Doing math with paper and pencil can come in real handy, so make sure you're comfortable multiplying decimals by hand. After all, you don't want the calculator to be a crutch!
How Do You Plot Points in the Coordinate Plane?

Knowing how to plot ordered pairs is an essential part of graphing functions. In this tutorial, you'll see how to take an ordered pair and plot it on the coordinate plane. Take a look!
What is an Ordered Pair?

Ordered pairs are a fundamental part of graphing. Ordered pairs make up functions on a graph, and very often, you need to plot ordered pairs in order to see what the graph of a function looks like. This tutorial will introduce you to ordered pairs!
What is the Coordinate Plane?

You can't graph a function or plot ordered pairs without a coordinate plane! Learn about the coordinate plane by watching this tutorial.
What are Quadrants in the Coordinate Plane?

Did you know that there are four quadrants that help make up the coordinate plane? Learn about these quadrants, and what ordered pairs are located in each, by watching this tutorial!
How Do You Divide Whole Numbers?

Division is a building block of math. This tutorial shows you how to perform long division by going through the process one step at a time.
How Do You Solve a Word Problem by Dividing Whole Numbers?

Word problems are a great way to see math in the real world! Math can help us answer everyday questions. Watch this tutorial to see how division is used to solve a word problem.
How Do You Use the Distributive Property to Rewrite and Solve an Addition Problem?

Did you know you can solve an addition problem using the distributive property? This tutorial shows you how to do exactly that!
How Do You Distribute a Number into an Addition Problem to Solve?

If you're trying to multiply the sum of two numbers, the distributive property may make things easier. Follow along with this tutorial to see how the distributive property can be used to evaluate an expression.
How Do You Compare Two Decimals Using a Number Line?

If you have two decimals and you want to know which is larger, you can use a number line to help you compare! Follow along with this tutorial to see how to use a number line to compare decimals.
How Do You Use Front-End Estimation to Estimate a Sum of Several Decimals?

Front-end estimation can be a great way to approximate a sum. In this tutorial, you'll see how to use front-end estimation to approximate the cost of school supplies!
How Do You Estimate a Sum of Decimals by Clustering?

If you want to find the approximate sum of decimals, you can round those numbers first! This tutorial shows you how to round decimals and see what numbers they're close to in order to make adding easier.
How Do You Multiply a Decimal by a Whole Number?

If you want to multiply a decimal by a whole number, just ignore the decimal point and multiply like normal! Then, bring the decimal point back for the answer. This tutorial shows you the entire process step-by-step.
How Do You Multiply a Decimal by a Whole Number Using Estimation to Place the Decimal?

When you multiply a decimal and a whole number, removing the decimal point can make multiplying easier, but where does the decimal point go when you want to get your answer? In this tutorial, you'll see how to estimate the location of the decimal point after you multiply!
How Do You Solve a Word Problem by Dividing with Decimals and Rounding Your Answer Up?

You never know where division might pop up! This word problem is a great example of using long division to solve a problem.
What is a Greatest Common Factor?

Being able to take out a greatest common factor can make a problem easier to work with, but before you do that, you need to understand what a greatest common factor is. This tutorial explains exactly that!
What Does It Mean to Divide Fractions?

This tutorial gives an in-depth look at dividing fractions by showing you what it really means to divide them.
How Do You Represent Real World Situations Using Integers?

The real world has all sorts of math clues! See how to use math to represent real world situations by watching this tutorial:
What Does Absolute Value Mean In the Real World?

You may know how to calculate the absolute value of a number, but what are you really finding? This tutorial uses a real world example to help you gain a better understanding of absolute value.
How Do You Graph Ordered Pairs in Each Quadrant?

Plotting points on the coordinate plane is the foundation for graphing equations! Check out this tutorial to get some practice plotting points and identifying which quadrant each point is in.
How Do You Put Integers in Order Using a Number Line?

Putting numbers in order can help you better understand how the numbers are related. This tutorial shows you how to put positive and negative temperatures in order using a number line!
How Do You Compare Integers Using a Number Line?

Trying to figure out if a negative number is larger than another can be a little tricky. To make things easier, you could use a number line! This tutorial shows you how to use a number line to compare two negative numbers and determine which is larger.
What is the Opposite, or Additive Inverse, of a Number?

Have you ever combined two numbers together and found their sum to be zero? When that happens, those numbers are called additive inverses of each other! In this tutorial, you'll learn the definition for additive inverse and see examples of how to find the additive inverse of a given value.
What are Positive and Negative Numbers?

Positive and negative numbers (and zero!) are the building blocks of math. This tutorial will introduce you to positive and negative numbers and show you their location on a number line. Plus, learn a special thing about the number zero!
What is the Number Line?

A number line is a way we can visually represent numbers. This tutorial gives you a great introduction to the number line and shows you how to graph numbers on the number line in order to compare them. Check it out!
How Do You Find All the Factors of a Number?

Trying to find all the factors of a number? Setting up a table can be really helpful! Check out this tutorial to see how to use a table to find all the factors of a given number.
How Do You Find the Greatest Common Factor of Two Numbers by Listing Their Factors?

The greatest common factor (GCF) is the largest factor two or more numbers have in common. Finding the GCF can be very useful in simplifying an expression or solving an equation. Watch this tutorial and learn what it takes to find the GCF of two numbers!
What is a Multiple?

Being able to find multiples of a number is important, especially if you want to find the least common multiple (LCM) between numbers. In this tutorial, you'll be introduced to the term multiple. You'll also see how to find multiples of a given number!
What is a Common Multiple and Least Common Multiple?

Sometimes terms in math do a pretty good job of describing the thing they name. This is the case with common multiple and least common multiple (LCM). A common multiple is a multiple that two or more numbers have in common. You can probably guess what a least common multiple is! To get more information about these terms, check out this tutorial!
How Do You Divide a Decimal by a Decimal?

Dividing decimals? Then this tutorial is a must see! Follow along and learn how you can divide decimals by rewriting the problem as a fraction and then using long division to solve. Check it out!
How Do You Divide Fractions?

Dividing fractions? Change that division to a multiplication by multiplying the dividend by the reciprocal of the divisor. Learn all about it by watching this tutorial!
How Do You Put Fractions and Decimals in Order?

Ordering numbers from least to greatest? Are the numbers in different forms? To make comparing easier, convert all the numbers to decimals. Then, plot those decimals on a number line and compare them! This tutorial shows you how!