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Korianna
Hi there!

PEMDAS is an important thing to know in math.

PEMDAS means
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

When looking at a math problem like, we'll say, 3² × 7 ÷ (8 - 2 + 1), you would have to use the formula PEMDAS to get your answer. And here's a BIG thing - YOU HAVE TO GO IN ORDER WHEN DOING THIS!

So, in PEMDAS, Parenthesis comes first. Let's work what's in the parenthesis. 8-2 = 4. 4+1 = 5. (Oh, I did subtraction first because this really doesn't matter when solving equations...)

Now we can put that 5 to the side.

Next in the sequence comes Exponents. 3 raised to the 2nd power is 9, since 3 × 3 = 9. (Exponents are tricky because when a number is raised to a power, people normally think to multiply the base number by the exponent, but it really is repeated multiplication, so whatever the raised power is, you multiply the base by itself that many times...)

Now, we can put that 9 to the side too. Now we can multiply 9 by 7, which s 63. PUSH THAT ASIDE...

63 ÷ 5 = 12.6

If I am wrong, let me know, but this was supposed to be an example of how to use PEMDAS in the rest of your equations you may have. :)

Hope this helps!
Okie so PEMDAS stands for Parentheses, Exponents, Multiplication, Division, Addition, and Subtraction.
This is called the order of operations, because when solving a problem, you have to go step-by-step using the above order.
Example;
9^3 - 10(6 + 3).
So we would solve it following the order of PEMDAS.
So we would first have to solve anything that's in parentheses first, and in this case, it's (6 +3). 6 + 3 = 9. now ANY NUMBER that's right next to a parentheses, (like how in our problem 10 is close to (6 + 3)), that means you'd multiply the two. But before THAT you must follow the next step in the order of PEMDAS. So moving on, now we must solve anything with EXPONENTS. We have an exponent at the beginning of this problem, and it is 9^3. To solve that, we would multiply 9 times itself 3 times. So it would be 9 x 9 x 9 = 729. Now with multiplication or division, you would solve it with whatever comes first in the problem, and the same goes for addition and subtraction. So now, we could multiply that 10 times (6 + 3), (which is 9), to get 10 x 9 = 90, so the final step would be to subtract 729 - 90 to receive the final answer as 639. c:

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