When you have more than one operation in a math problem, you must solve it following the correct ORDER OF OPERATIONS:
 
  1. First, copy the problem EXACTLY.
  2. Then go through each level of operations (Please Excuse My Dear Aunt Sally).
  3. Do the operations within each level from left-to-right.
  4. Write the answer directly below the operation sign.
  5. Bring down the other numbers (be careful not to re-use any).
  6. Continue until all operations are completed.
  

Example

  14 + (16 - 9) x 42 - 36 ÷ 9
Please 14 + 7 x 42 - 36 ÷ 9
Excuse 14 + 7 x 16 - 36 ÷ 9
My 14 + 112 - 36 ÷ 9
Dear 14 + 112 - 4
Aunt 126 - 4
Sally 122



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http://amby.com/educate/ord-op/pg-01.html