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Big Ideas Math: Modeling Real Life, Grade 8

BI

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

1. Finding Square Roots

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Exercise 34 Page 379

Remember the order of operations.

7

Practice makes perfect

To evaluate the given numeric expression, we need to remember the order of operations. The acronym PEMDAS can help with that!

pemdas

Let's now consider our expression. 3 ( sqrt(16)) - 5 We first need to simplify the value of the expression in the parentheses. Within the parentheses, we need to calculate the square root. Because we know that 4^2=16, we know that sqrt(16)=4. 3(sqrt(16))-5 calculate root ⟶ 3(4)-5 Now we can finish evaluating our expression. We will multiply the term inside the parentheses by the 3, and then subtract 5 from the result.

3(4)-5

Multiply

12-5

Subtract term

7

Subchapter links

Try It p.374-376

Self-Assessment for Concepts & Skills p.376

Self-Assessment for Problem Solving p.377

Review & Refresh p.378

Concepts, Skills, & Problem Solving p.378-380