You're probably surprised we got this far down the page before mentioning Least Common Denominator (LCD), eh? In this video we cover adding and subtracting fractions with different denominators using the LCD method (similar to least common multiple), or LCM. I also show you a great trick for coming up with a common denominator when you're having trouble thinking of a number that both denominators go into. 7.NS.1, 7.NS.2, 7.NS.3

Multiplying & Dividing Fractions

Even though students start fractions in elementary school, multiplying and dividing them gets a little bit "interesting" in Algebra with triple-deck fractions. In this video we cover the basics, but we also look at the algebraic nightmares which are "complex" fractions (fractions within fractions).7.NS.1, 7.NS.2, 7.NS.3

Improper Fractions and Mixed Numbers

In this video we'll learn about the basics of fractions in Algebra, and how in algebra fractions are all about division. We'll also review what improper fractions are, how to convert improper fractions to mixed numbers, how to convert mixed numbers to fractions, and what to do if there's a zero in a fraction's numerator or denominator.7.NS.1, 7.NS.2, 7.NS.3

Fractions & Mixed Numbers on Calculator

Students these days love calculators! So in this video we'll talk about how to do the same basic fraction stuff we covered in the last video, except this time on your calculator. We'll also cover converting fractions and mixed numbers to decimals, and how different calculator types (four-function, scientific, graphing) treat fractions differently.7.NS.1, 7.NS.2, 7.NS.3

How to Reduce Fractions (free)

There are a few different methods of reducing fractions -- prime factorization, factor trees, "pulling stuff out" -- and we'll cover them all in this video. We'll also talk about common mistakes and how to avoid them.7.NS.1, 7.NS.2, 7.NS.3

Converting REPEATING Decimals to Fractions

You need equations and variables to convert repeating decimals to fractions, so if you're not there yet in class, skip this video. But if you're ready for this topic, it's definitely one of the only fun things you'll do in algebra. Most of my students, even ones who hate math, enjoy working these problems because... I don't know why, maybe because it feels like you're outsmarting your calculator?7.NS.1, 7.NS.2, 7.NS.3

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If you do not have an account, you should get one, because it is awesome! You can save a playlist for each test or each chapter, and save your "greatest hits" into a "watch right before the final" list (not that we recommend cramming, but when in Rome...)