# Order of Operations Part 4

Taught by YourMathGal
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Part of video series
Meets NCTM Standards:
Lesson Summary:

In this lesson, the Order of Operations is explored through examples that contain fractions and negative numbers. The key takeaway is that when working with the Order of Operations, it's important to simplify within grouping symbols before moving on to the next step. Additionally, exponents should be done before subtraction, and multiplication should be done before subtraction as well. Finally, it's important to remember to change subtraction to adding the opposite when subtracting a larger negative number from a smaller positive number.

Lesson Description:

Part 2 of Order of Operations: Shows examples. Contains fractions and negative numbers.

More free YouTube videos by Julie Harland are organized at http://yourmathgal.com

Questions answered by this video:
• How can you simplify rational expressions that have negative numbers using order of operations?
• How do you simplify (-10 + -2)/(6^2 - 30) using order of operations?
• How do you evaluate 16 - 4*(3^3 - 7)/(2^3 + 2) - (-2)^2 using order of operations?
• How do you evaluate 6 + 3[8 - 3(1 + 1)] with order of operations?
• How do you know what to do first when you are evaluating an expression?
• How do you evaluate 3 - 2[8 - (3 - 2)] with order of operations?
• Why can you not subtract 3 - 2 first in 3 - 2[8 - (3 - 2)]?
• How do you evaluate (3/4)^2 * (-4) * 2^3 using order of operations?
• #### Staff Review

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This lesson takes the previous lessons in this series a bit further. This time, there are negative numbers and more complex expressions with fractions. Order of operations must be used to evaluate these expressions correctly.