Exercise 13 Page 397

We want to write the given mixed number as a decimal. -12 16 To do so, we will first rewrite it as a fraction. We will ignore the negative sign for just a moment.

12 16

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Rewrite 12 16 as 73/6

MixedToFrac

a bc=a* c+b/c

12 * 6 + 1/6

Multiply

Multiply

72 + 1/6

AddTerms

Add terms

73/6

We found that 12 16 written as a fraction is 73 6. Recall that this means 73÷ 6. Therefore, we will divide the numerator of this fraction by its denominator. Let's do it!

We can see that the pattern starts to repeat itself after a few steps. This means that the decimal is a repeating decimal. We can write it using a bar notation. Remember, the bar goes over the decimal part that repeats itself. 12.166666... = 12.16 We found that 12 16 written as a decimal is 12.16. Therefore, - 12 16 is equal to - 12.16.