Uh-oh! Same trap....

You correctly solved the parentheses first. Perhaps when you wrote down the total inside the parentheses you forgot what to do with the number outside the parentheses.

5 + 3(6 + 4) is equal to 5 + 3 * (6 + 4)

5 + 3(10) is equal to 5 + 3 * 10

With the 'traditional' algebraic form shown on the left, it's easy to overlook the multiplication (to be completed before the addition). If you wish, you may insert an actual multiplication sign (as shown at the right). [Get used to using the asterisk * instead of the 'times sign' (x) when you indicate multiplication. That way you won't have to 'unlearn' this process later in algebra.]

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As you solve this problem, write down all the remaining quantities line-by-line, and follow the correct ORDER OF OPERATIONS.

## 8 + 2(4 + 1) =

 Click on your answer: 15 17 18 19 50 80 any other answer

Order of Operations Automatic Flip-Through SLIDE SHOW

Overview of the Order of Operations

© 1992, 1999   Amby Duncan-Carr   All rights reserved.