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Big Ideas Math Integrated I, 2016

BI

Big Ideas Math Integrated I, 2016 View details

5. Rewriting Equations and Formulas

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Exercise 48 Page 42

Pay close attention to the order of operations.

34

Practice makes perfect

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

18* 2 - 4^2÷ 8 For the given expression exponents should be calculated first, followed by multiplications and divisions, then finally subtraction.

Operation	Before Simplification	After Simplification
Calculate power	18* 2-4^2÷ 8	18* 2 - 16÷ 8
Multiply	18* 2-16÷ 8	36-16÷ 8
Calculate quotient	36- 16 ÷ 8	36- 2
Subtract term	36- 2	34

The expression equals 34.

Alternative Solution

Using a Calculator

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

Subchapter links

Communicate Your Answer p.35

Monitoring Progress p.36-39

Exercises p.40-42