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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 12 Page 375

Remember the order of operations.

11

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.

15 - ( sqrt(4))^2 We first need to simplify the value of the expression in the parentheses. We can use inverse operations to evaluate the power and eliminate the square root. Remembering the properties of inverse operations, we can now write that ( sqrt(4))^2=4. 15-( sqrt(4))^2 inverse operations ⟶ 15-4 Now we can finish evaluating our expression by subtracting the remaining terms. 15-4 ⇔ 11

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