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How do I get 9+4*(8*8-30)
 Apr 4, 2014

Best Answer 

 #3
avatar+8259 
+5

CPhill didn't give you the answer, then I will.

 $${\mathtt{9}}{\mathtt{\,\small\textbf+\,}}{\mathtt{4}}{\mathtt{\,\times\,}}\left({\mathtt{8}}{\mathtt{\,\times\,}}{\mathtt{8}}{\mathtt{\,-\,}}{\mathtt{30}}\right) = {\mathtt{145}}$$

That is the answer, CPhill.

But good answers, you two.

 Aug 1, 2014
 #1
avatar+111395 
+5
9+4*(8*8-30)
 Apr 5, 2014
 #2
avatar+1667 
+3
There is something called the Order of Operations. This is a rule that states that there is a certain order in which you have to do a problem.

It goes like this:

Parentheses
Exponents
Multiplication & Division
Addition & Subtraction

The problem is 9+4*(8*8-30).
First, we need to do what's in the parentheses. There is multiplication AND subtraction, but we do the multiplication first. That gets us 9+4*(64-30)
Finish what's in the parentheses. 9+4*34
There is only addition and multiplication, but multiplication is done first. That gets 9+136.
Do the addition which gets you 145!

VOILA! Your answer is 145!

Tip: I remember the Order of Operations with a mnemonic.

Parentheses
Exponents
Multiplication
Division
Addition
Subtraction

turns into

Please
Excuse
My
Dear
Aunt
Sally
 Apr 5, 2014
 #3
avatar+8259 
+5
Best Answer

CPhill didn't give you the answer, then I will.

 $${\mathtt{9}}{\mathtt{\,\small\textbf+\,}}{\mathtt{4}}{\mathtt{\,\times\,}}\left({\mathtt{8}}{\mathtt{\,\times\,}}{\mathtt{8}}{\mathtt{\,-\,}}{\mathtt{30}}\right) = {\mathtt{145}}$$

That is the answer, CPhill.

But good answers, you two.

DragonSlayer554 Aug 1, 2014

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