Converting 13/2 to Decimal: Step-by-Step Fraction Division

Fraction to Decimal with Long Division

Convert 132 \frac{13}{2} into a decimal.

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Convert to decimal fraction
00:03 We want a denominator that's a multiple of 10 and 10
00:06 Therefore we'll expand the fraction, making sure to multiply both numerator and denominator
00:17 Convert to decimal fraction
00:20 We'll write the numerator as a whole number
00:23 When the denominator equals 10
00:26 Move the decimal point once to the left
00:29 And this is the solution to the question

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

Convert 132 \frac{13}{2} into a decimal.

2

Step-by-step solution

To solve this problem, we'll follow this approach:

  • Step 1: Identify the given fraction: 132 \frac{13}{2} .
  • Step 2: Perform long division to convert the fraction into a decimal.
  • Step 3: Alternatively, understand it as 264\frac{26}{4} or by direct interpretation gain conversion into a decimal.

Now, let's work through each step:

Step 1: We have the fraction 132 \frac{13}{2} .

Step 2: Divide 13 by 2 using long division:

When you divide 13 by 2, 2 goes into 13 six times (since 6×2=126 \times 2 = 12), leaving a remainder of 1. Bring down the decimal point and continue division. Hence, 10 divided by 2 gives 5. Therefore, the decimal equivalent of 132\frac{13}{2} is 6.56.5.

Step 3: Verification via mixed conversion: Recognizing 132=612=6.5\frac{13}{2} = 6 \frac{1}{2} = 6.5.

Therefore, the solution to convert 132\frac{13}{2} into a decimal is 6.5\textbf{6.5}.

Hence, the correct choice among the given options is: \textbf{6.5}

3

Final Answer

6.5

Key Points to Remember

Essential concepts to master this topic
  • Division Rule: Divide numerator by denominator using long division
  • Technique: 13 ÷ 2 = 6 remainder 1, then 10 ÷ 2 = 5
  • Check: Convert back: 6.5 × 2 = 13 ✓

Common Mistakes

Avoid these frequent errors
  • Forgetting to add the decimal point
    Don't just divide 13 by 2 and stop at 6 with remainder 1 = incomplete answer! This ignores the fractional part completely. Always continue division by adding a decimal point and zeros to get the complete decimal form.

Practice Quiz

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How much of the whole does the shaded area (blue) represent?

FAQ

Everything you need to know about this question

Why do I need to add a decimal point when dividing?

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The decimal point lets you continue dividing when there's a remainder! After getting 13 ÷ 2 = 6 remainder 1, you add .0 to make it 10 ÷ 2 = 5, giving you 6.5.

What if the division never ends?

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Some fractions like 13 \frac{1}{3} create repeating decimals (0.333...). You can round to a certain number of decimal places or use the repeating decimal notation.

Can I use a calculator instead of long division?

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Yes! But learning long division helps you understand how fractions become decimals. It's especially useful when calculators aren't allowed on tests.

Is there a faster way to convert simple fractions?

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For fractions with denominators of 2, 4, 5, 8, 10, you can often recognize patterns: 12=0.5 \frac{1}{2} = 0.5 , 14=0.25 \frac{1}{4} = 0.25 , etc. But long division always works!

How do I know my decimal answer is correct?

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Multiply your decimal answer by the original denominator. If you get the numerator back, you're right! For example: 6.5 × 2 = 13 ✓

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