Solving ratio problems using tables and the coordinate plane --Lesson 1 ...

Unit Rate by Shmoop

Math Snacks: Ratey the Math Cat

The Ratio and Fraction song, (Stereo Hearts) Remix

Part to Whole Ratios

Understanding ratios and using ratio language to describe a ratio relati...

WIN: Long Division with Decimals

Understanding division of fractions: Using a number line, we'll explain the rule of "invert and multiply" when dividing two fractions.

Check Your Fraction Division by Using Reciprocals: Keep, Change, Flip

Dividing Mixed Numbers by Fractions

Dividing Fractions by Whole Numbers

Dividing whole numbers and fractions: potpourri: Solve a word problem by dividing a whole number by a fraction. The example used in this video is 4 ÷ 1/5.

Distributive Property

The distributive law of multiplication over subtraction: Learn how to apply the distributive property of multiplication over subtraction and why it works. This is sometimes just called the distributive property or distributive law.

The distributive law of multiplication over addition: Learn how to apply the distributive law of multiplication over addition and why it works. This is sometimes just called the distributive law or the distributive property.

All You Need to Know About LCM and GCF

All You Need to Know About LCM

The LCM and GCF Song

The LCM

GCF and LCM Games

http://www.fun4thebrain.com/beyondfacts.html

Least common multiple exercise: We're practicing finding the least common multiple in these example exercises. We'll teach you the prime factorization approach which is a pretty nifty way to find the lcm (least common multiple).

Greatest common factor explained: Here's a nice explanation of least common factor (or least common divisor) along with a few practice example exercises. Let's roll.

Greatest Common Factor

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Greatest Common Factor-Division Ladder Example

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Greatest Common Factor-Factor Tree Example

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Prime Factorization

Recognizing prime and composite numbers: Can you recognize the prime numbers in this group of numbers? Which are prime, composite, or neither?