Mathematics Lessons - 4 (Arithmetic Review For College)

This is a series of mathematics lessons that will review the important topics in arithmetics with examples and solutions.

These lessons will also be useful as a pre-Algebra review.
The videos are presented by the Portland Community College.

Math 20 - Lesson 13

Primes and Composites

Math 20 - Lesson 14

Prime Factorization

Math 20 - Lesson 15

Least Common Multiple

Math 20 - Lesson 16

Fractions and Mixed Numbers: What is a Fraction?

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Try out our new and fun Fraction Concoction Game.

Add and subtract fractions to make exciting fraction concoctions following a recipe. There are four levels of difficulty: Easy, medium, hard and insane. Practice the basics of fraction addition and subtraction or challenge yourself with the insane level.

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