Big Ideas Math: Modeling Real Life, Grade 7
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3. Converting Between Fractions and Decimals
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Exercise 46 Page 66

To rewrite a fraction as a decimal, divide the numerator by the denominator.

- 2.4, - 2.25, - 11/5, 15/10, 1.6

Practice makes perfect

We want to order the numbers from least to greatest. - 11/5, - 2.4, 1.6 , 15/10 , - 2.25 To help us compare the numbers, we will first rewrite the fractions - 115 and 1510 as decimals.

Rewrite - 115 as a Decimal

We want to rewrite the fraction - 115 as a decimal number. Let's ignore the negative sign for the moment. Since 11 5 means 11÷ 5, we will divide the numerator by the denominator. Let's do it!

We found that 115 written as a decimal is 2.2. This means that - 115 written as a decimal is - 2.2.

Rewrite 1510 as a Decimal

Now let's rewrite the fraction 1510 as a decimal number by dividing the numerator by the denominator.

We found that 1510 written as a decimal is 1.5.

Order the Numbers from Least to Greatest

Let's organize our decimal numbers. - 11/5, - 2.4, 1.6 , 15/10 , - 2.25 [0.5em] ⇕ [0.2em] - 2.2, - 2.4, 1.6 , 1.5 , - 2.25 Now we can compare the given numbers by plotting the decimals on the number line.

plotting point

Looking at the diagram, we can see that the least number is - 2.4. We read the numbers from left to right to rearrange them in order from least to greatest. - 2.4 , - 2.25 , - 2.2, 1.5 , 1.6 [0.2em] ⇕ [0.2em] - 2.4 , - 2.25 , - 11/5, 15/10 , 1.6