# Order Of Operations: PEMDAS | Arithmetic Properties | Pre-Algebra | Khan Academy

Work through another challenging order of operations example with only positive numbers.

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Pre-Algebra on Khan Academy: No way, this isn’t your run of the mill arithmetic. This is Pre-algebra. You’re about to play with the professionals. Think of pre-algebra as a runway. You’re the airplane and algebra is your sunny vacation destination. Without the runway you’re not going anywhere. Seriously, the foundation for all higher mathematics is laid with many of the concepts that we will introduce to you here: negative numbers, absolute value, factors, multiples, decimals, and fractions to name a few. So buckle up and move your seat into the upright position. We’re about to take off!

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## 19 thoughts

1. soju69jinro says:

why do you use PEMDAS? what’s the conceptual reasoning behind it? i mean just because you say PEMDAS, are we supposed to take that as a fact? why not SADMEP? or PMDEAS? what’s the conceptual reasoning behind that order… not knowing that makes math less of a logical process than understanding the reason behind it.

2. Ebonee Bost says:

Its just PEMAS that’s please excuse my ant sally

3. TheRoyalAztec says:

Can anyone help me with the first order of operations. My professor said that in old textbooks there is a first order of operations that is not groups or parentheses. Not sure what it is and could not find it on the web. He also said it is not functions. Please help anyone.

4. Isaiah Johnson says:

So easy know

5. Shaine MacDonald says:

7+3=9 but it’s in brackets so wouldn’t it stay in brackets in the equation and then that would make it 7×2+(16)÷4×2?

6. Pinkie Dash And Flarity says:

9/3-2*4=13

7. TheBoys Gros says:

GEMDAS IS THE CORRECT ONE PARINTHISEIS IS PART OF GROUPING

8. ItzSammy says:

The process looks like a diamond

9. Pavitra Surma says:

Wouldn’t you put brackets instead of parentheses inside parentheses?

( says nice VERY sarcasticly ) nicccceeeee ( the only reason I watched this was cuz my teacher told me to )

11. Christopher Davis says:

thank you so much, I have a test tomorrow and will probably get an a on it thank you!

12. Sali Mutambo says:

in the UK it’s BIDMAS 😅

13. Cherry Pug says:

good 🙂

14. Sathvick Satish says:

Pls God let Sal’s videos get 500k likes

15. Ivory says:

please excuse my dope ass swag

16. Bob McCoy says:

Is it not BEDMAS?
Haha jk 😋

17. Karpov Liam says: