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Big Ideas Math: Modeling Real Life, Grade 8

BI

Big Ideas Math: Modeling Real Life, Grade 8 View details

1. Parallel Lines and Transversals

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Exercise 5 Page 108

Pay close attention to the order of operations.

51

Practice makes perfect

According to the order of operations, exponents are evaluated before addition and subtraction. For the given expression, this means evaluating the exponent first, then addition and subtraction.

Operation	Before Simplification	After Simplification
Calculate power	11+(-7)^2-9	11+ 49-9
Add terms	11+ 49-9	60-9
Subtract term	60- 9	51

The expression equals 51.

Alternative Solution

Using a Calculator

We can also evaluate this expression using a calculator. To do so, type it as shown below.

Subchapter links

Try It p.104-106

Self-Assessment for Concepts & Skills p.106

Self-Assessment for Problem Solving p.107

Review & Refresh p.108

Concepts, Skills, & Problem Solving p.108-110