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## Arithmetic

### Course: Arithmetic>Unit 17

Lesson 6: Order of operations with exponents

# Order of operations introduction

Introducing the order operations: what they are, why we use this order, and how to use the order of operations to evaluate some basic expressions. Created by Sal Khan.

## Want to join the conversation?

• When Sal said "armed by the order of operations" my brother yelled "oh no, its another D-Day, and I died laughing at that
• D-DAY is war, like the world war 1, 2 , or 3
• Wouldn't it be addition before subtraction to make the last answer 17?
• If you want to do addition first, you would have 20-2+1, but -2+1=-1, so 20-1=19.
• I dont get it can someone explain?
• pemdas is easy
• good for you

first, 5 x 2 = 10.
Then, 10 + 3 = 13
• Good job! 👍
• I learned Pemdas in like, 5th grade
• Good for you 👍
• pemdas is easy