Hello w/ewew/e. These are different expressions:

\(\displaystyle 3.5 - \frac{1.5}{3.5}\)

\(\displaystyle \frac{3.5 - 1.5}{3.5}\)

In the first expression, we do the division first.

In the second expression, we do the subtraction first.

Typing

3.5-1.5/3.5 means the first expression.

For the second expression, we type grouping symbols around the

__numerator__ (like Dr. Peterson showed).

Here are some links to lessons about Order of Operations:

Math explained in easy language, plus puzzles, games, quizzes, videos and worksheets. For K-12 kids, teachers and parents.

www.mathsisfun.com

Learn how to calculate things in the correct order. Calculate them in the wrong order, and you can get a wrong answer!

www.mathsisfun.com