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how do i solve 5(3)+2(18)-18/3

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2 Answers

Hello Andrew,
 
It would be my pleasure to help you solve this problem.
You will want to refere to what is known as the "Order of operations". This "cheat sheet" will tell you which parts of the math problem to calculate first and which calculations to do last. There is a great mnemonic out there to help you remember the order of operations:
 
1st: Please = Parentheses
2nd: Excuse = Exponents
3rd: My = Multiplication
4th: Dear = Division
5th: Aunt = Addition
6th: Sally = Subtraction
 
 
I will now walk you through the problem you have posted using the mnemonic for the order of operations:
 
5(3)+2(18)-18/3= ?
 
Please = Parentheses
5(3) = 5 X 3 = 15
2(18) = 2 X 18 = 36
 
Updated problem: 15 + 36 - 18/3 = ?

Excuse = Exponents
None

My = Multiplication
None

Dear = Division
18/3 = 18 รท 3 = 6
 
Updated problem: 15 + 36 - 6 = ?
 
Aunt = Addition
15 + 36 = 51
 
Updated problem: 51 - 6 = ?

Sally = Subtraction
51 - 6 = 45
 
As you can see, following the order of operations leads you to your answer, 45. If you have any more questions as to how I arrived at 45, feel free to send me a private message. Good luck in your scholastic endeavors and have a great day!
 
--Raphael B.