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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 37 Page 379

Remember the order of operations.

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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. 8 ( sqrt(8.41)) + 1.8 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 (2.9)^2=8.41, we know that sqrt(8.41)=2.9. 8(sqrt(8.41))+1.8 calculate root ⟶ 8(2.9)+1.8 Now we can finish evaluating our expression. We will first multiply the term inside the parentheses by the 8, and then add 1.8 to the result.

8(2.9)+1.8

Multiply

23.2+1.8

Add terms

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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