### Intro to multiplication: work your way through videos and activities to review Xs

Sal uses arrays and repeated addition to visualize multiplication.

khanacademy.org

### Introduction to order of operations | Arithmetic properties | Pre-Algebra | Khan Academy

This example clarifies the purpose of order of operations: to have ONE way to interpret a mathematical statement. Practice this lesson yourself on KhanAcadem...

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### Order of operations example | Arithmetic properties | Pre-Algebra | Khan Academy

Work through a challenging order of operations example with only positive numbers. Practice this lesson yourself on KhanAcademy.org right now: https://www.kh...

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