Order of Operations - PEMDAS (Learn Algebra 1)

Learn how to do the order of operations in this free math video tutorial by Mario's Math Tutoring. Knowing the PEMDAS acronym to help you know what you should do first when simplifying an expression is an important concept in learning Algebra.

0:08 What is the Order of Operations
0:23 Acronym PEMDAS "Please Excuse My Dear Aunt Sally"
1:22 How to Work With Fractions with Order of Operations
1:38 Example 1 3 - 2^2*3
2:57 Example 2 (1/2)(3+5) - 4
4:25 Example 3 16/(7+5^2)
5:24 Example 4 5(15-(8-6)^3)
6:54 Example 5 (2x+3)/(x-6) Evaluate When x = 9

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Distributive Property Lesson From Learn Algebra 1 Video Course

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[springdimartino]

Thank you!! I've been out of high school for 31 years and am pursing my MSN which is requiring a satanic algebra class! Obviously, I have no memory of any of that from my childhood and your videos are SAVING me. I've watched many of these similar videos on Youtube and no one has explained it as perfectly as you have! A+!

[logmanyadigg]

Thank you! I am a 7th grade student and my teacher doesn’t’ help at all, I need a tutor but the ones near me charge a lot! This helped me a lot thx🤗😀😀

[williejohnson]

7:07 Your treatment was a breath of fresh air. You are the only instructor I have seen on the internet who honors implicit multiplication and the true meaning of the obelus (division sign) when applying PEMDAS.

[triky]

Nice way of explaining everything. I've watched many videos, and they all seem confusing since the people don't really explain what they do, they might think they explain it, but they basically just revolve the problems for themselves. You explained it nice and it was easy to understand. Thank you

[huntertooler]

you are a legend thx so much your helping me go from year 8 maths back to year 10 maths

[GodsservantJohn]

Great and we'll thought-out video... great refresher!

[kellsliving]

going back to school soon this is great

[abrahamgomez]

Thank you so much my algebra teacher doesnt teach anything he just gets a problem from the book doesnt explain it makes us do it and then we have a do now with completely different stuff

[iftakakazai]

It is very useful to me. Thank you, sir, to make it for us.

[bdunlevy]

Hi. For the second problem half of 8 is 4. What do you mean by multiply? Cutting 8 in half is multiplication for algebra?

[cristinasflowershop]

omg I love you, you're a life saver for online school :'))
I don't join video calls since I hate showing my face, thank you so much

[geraldnorris]

I am in 6th grade and I have know idea how to do this and this video really helped

[guts]

My gf who went to college said you do multiplication first in order of operations thank you for proving her wrong and me right ( I dropped out of community college so I’m big dumby)

[bdunlevy]

How does algebra help you out with figuring out a problem outside of arithmetic or mathamatics? Where can algebra be applied?

[Saucecasm]

basically everyone at one point didnt know how to do a math problem and serched it up on youtube

[michaelmcglashan]

Dot for multiplication is hard in a decimal world. Glad we don’t use it here!

[RealMesaMike]

Precedence of operations, not "order."
You don't necessarily have to do things in precedence order.

For example, if you are to evaluate the expression 1 + 2 + 3*4 - 5*(7-6), you certainly don't need to work out what's in the parentheses first. There are at least 3 different things you can start with other than working out what's in the parentheses and still arrive at the correct answer.
You could multiply 3*4 first.
You could add 1+2 first.
You could distribute (multiply) the 5 through the parentheses first.

Teaching PEMDAS as an "order of operations" that should be blindly followed like an algorithm to crank out the answer to an arithmetic problem by rote is a disservice to students, in my opinion.