Please check your scratch paper: Do you have parentheses around the 'three plus five' like this:
If so, remember that (3 + 5) is a grouping and you'd complete it first.
If you do not have parentheses, you've found the error.
Relax for a moment, then copy and solve the following problem. Remember to include the parentheses, and do the grouping first.
42 - 3(2 + 4) + 5 =
Order of Operations Automatic Flip-Through SLIDE SHOW
Overview of the Order of Operations
© 1992, 1999 Amby Duncan-Carr All rights reserved.