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Big Ideas Math: Modeling Real Life, Grade 8

BI

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

4. Rational Numbers

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Exercise 12 Page 397

Start by writing the given mixed number as a fraction. Then, divide the numerator by the denominator.

3.4

Practice makes perfect

We want to write the given mixed number as a decimal. 3 49To do so, we will first rewrite it as a fraction.

3 49

▼

Rewrite 3 49 as 31/9

a bc=a* c+b/c

3 * 9 + 4/9

Multiply

27 + 4/9

Add terms

31/9

We found that 3 49 written as a fraction is 31 9. Recall that this means 31÷ 9. Therefore, we will divide the numerator of this fraction by its denominator. Let's do it!

We found that 319 written as a decimal is 3.4. Since we previously found that 3 49 is equal to 319, we can say that 3 49 written as a decimal is 3.4.

Subchapter links

Try It p.396-397

Self-Assessment for Concepts & Skills p.397-398

Review & Refresh p.399

Concepts, Skills, & Problem Solving p.399-400