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Big Ideas Math Integrated I, 2016

BI

Big Ideas Math Integrated I, 2016 View details

Maintaining Mathematical Proficiency

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Exercise 2 Page 271

Pay close attention to the order of operations.

106

Practice makes perfect

According to the order of operations we must remember to evaluate the exponent first, division and multiplication next, and addition and subtraction last. Let's do it for the given expression!

Operation	Before Simplification	After Simplification
Calculate power	5^2 * 8 ÷ 2^2 + 20 * 3 - 4	25 * 8 ÷ 4 + 20 * 3 - 4
Multiply	25 * 8 ÷ 4 + 20 * 3 - 4	200 ÷ 4 + 60 - 4
Divide by 4	200 ÷ 4 + 60 - 4	50 + 60 - 4
Add and subtract terms	50 + 60 - 4	106

The expression equals 106.

Alternative Solution

Using a Calculator

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

Subchapter links

Exercises p.271