Number System

Khan: GCF Practice Problems

Practice finding the GCF of given numbers.

https://www.khanacademy.org/math/pre-algebra/factors-multiples/greatest_common_divisor/e/greatest_common_divisor

Khan: Order of Operations Intro

Get started here to reiview PEMDAS, then watch the related videos to kick it up a notch (or 12)! You can also access Khan's practice problems here.

Introduction to order of operations: This example clarifies the purpose of order of operations: to have ONE way to interpret a mathamaical statement.

Khan: Intro to Exponents

Exponent example 1:

Khan: GCF & LCM Word Problems

Definitely check this out for a thorough review of GCF and LCM...

LCM and GCF word problems: Here we have a couple of word problems--one searching for the least common multiple and the other for the greatest common factor. Just read them with us slowly and follow along. You'll get it.