Operations & Algebraic Thinking

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What's a Prime Number?

Prime numbers aren't too hard to define, but they still puzzle professional mathematicians. Believe it or not, all over the word computers are chugging away, trying to find the next biggest prime! Bigger and bigger prime numbers help keep your credit card info safe through really cool encryption techniques. So prime numbers really matter every day, and you can learn how they are defined in this tutorial.
What's Another Definition for Prime and Composite Numbers?

If the only factors a number are 1 and itself, then that number is prime. A number that is not prime is called composite. Learn about prime and composite numbers by watching this tutorial!
How Do You Estimate a Multiplication Problem by Rounding?

Many real world math problems can be solved mentally. In this tutorial, you'll see how to estimate the answer to a word problem by multiplying mentally!
How Do You Extend a Sequence by Multiplying?

A sequence of numbers follows a pattern. If you can find that pattern, you can find more numbers in the sequence! In this tutorial, you'll see how to find the next terms in a sequence by first identifying the pattern of that sequence.
How Do You Find a Missing Term in a Sequence?

Finding the missing terms of a sequence is a breeze, as long as you know the pattern for the sequence. Follow along with this tutorial to see how to find the pattern of a sequence and then use it to find missing terms of that sequence!
How Do You Solve a Problem by Making a Table and Finding a Pattern?

Making a table can be a very helpful way to find a pattern in numbers and solve a problem. This tutorial shows you how to take the information from and word problem to create a table and use it to find the answer!
How Do You Write a Rule for a Pattern?

Some lists of numbers follow a pattern. To find that pattern, you need to know what you're looking for. This tutorial shows you how to find a pattern for a list of numbers and then write a rule that follows the pattern!
How Do You Figure Out What a Remainder Means When You're Dividing?

Division can help you solve all kinds of everyday problems! Just check out this tutorial involving sharing animal crackers!
What is a Factor?

The term 'factor' is seen a lot in math, so it's important to know what it means. This tutorial introduces you to that term!
What is Multiplication?

Multiplying integers is just like performing a bunch of additions of the same integer! Check out this tutorial and see how much multiplying and repeated addition have in common.
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!