If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Lesson 1: 2-step expressions

# Order of operations (2-step expressions)

Sal evaluates 2-step whole number expressions with different operations.

## Want to join the conversation?

• there are questions that i get wrong because i choose to do multiplication before division why is that?
shouldn't i be following PEMDAS?
• PEMDAS does not mean multiplication before division, even though it might appear that way. These two operations have equal priority and so should be done left to right. PEMDAS should really be presented as P E MD AS.
• this video was fire! keep it up!
• One of the questions was 9-1+9+3 to the 4th power.
According to PEMDAS, I did:
9-1+9+81 (exponents first)
1+9=10 and 10+81=91 (addition next since no mult. or div.)
but it was supposed to be 98.
How do we decide when we're supposed to do A & D from left to right and when we're supposed to follow PEMDAS?!
• You made a mistake in the third step. You have to go from right to left if the operation is the same. 9-1 is 8, 8+9 is 17, 17+81 is 98. You answer is 98. I don’t understand why you put an equal sign in the third step.
• How about someone says, "What is 2 divided 6 times 7". What do you do first?
• Multiplication and Division are equal operators and should be performed left to right.

So, you would perform 2/6 first, then multiply that result by 7.
• So this is how you do it?
• What does PADMAS stand for?
• pemdas: please end my depression and suffering