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Big Ideas Math: Modeling Real Life, Grade 8

BI

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

1. Solving Simple Equations

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Exercise 2 Page 8

Pay close attention to the order of operations.

46

Practice makes perfect

According to the order of operations, expressions inside parentheses are evaluated first, while addition and subtraction are evaluated last.

1+5* 3^2 For the given expression exponents should be calculated first, followed by multiplication, then finally addition.

Operation	Before Simplification	After Simplification
Calculate power	1+5* 3^2	1+5* 9
Multiply	1+ 5* 9	1+ 45
Add terms	1+ 45	46

The expression equals 46.

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.4-6

Self-Assessment for Concepts & Skills p.6

Self-Assessment for Problem Solving p.7

Review & Refresh p.8

Concepts, Skills, & Problem Solving p.8-10