Find Numbers Equal to 1/2: Fraction Equivalence Practice

Fraction to Decimal Conversion with Denominators

Which number is equal to 12 \frac{1}{2} ?

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Convert to decimal number
00:03 Convert the fraction to a fraction with denominator of 10
00:06 Make sure to multiply both numerator and denominator
00:13 When the denominator equals 10, the numerator is the decimal number
00:21 When dividing by 100, the decimal point moves twice to the left
00:26 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

Which number is equal to 12 \frac{1}{2} ?

2

Step-by-step solution

Let's multiply both the numerator and denominator by a number that will help us make the denominator 10:

1×52×5=510 \frac{1\times5}{2\times5}=\frac{5}{10}

Next we'll rewrite the simple fraction as a decimal fraction:

5.0 5.0

Since we're dividing by 10, the decimal point will move one place to the left, giving us:

.50 .50

Finally we'll add the 0 before the decimal point to get:

0.50=0.5 0.50=0.5

3

Final Answer

0.5

Key Points to Remember

Essential concepts to master this topic
  • Rule: To convert fractions to decimals, divide numerator by denominator
  • Technique: Make denominator 10 or 100: 12=510=0.5 \frac{1}{2} = \frac{5}{10} = 0.5
  • Check: Verify by converting back: 0.5 = 5/10 = 1/2 ✓

Common Mistakes

Avoid these frequent errors
  • Confusing decimal place values
    Don't think 1/2 = 0.12 or 0.15 because you see the numbers 1 and 2! This ignores the fraction bar meaning division. Always remember that 1/2 means 1 ÷ 2 = 0.5.

Practice Quiz

Test your knowledge with interactive questions

Write the following fraction as a decimal:

\( \frac{5}{100}= \)

FAQ

Everything you need to know about this question

Why is 1/2 equal to 0.5 and not 0.12?

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The fraction bar means division, not just placing numbers together! 12=1÷2=0.5 \frac{1}{2} = 1 ÷ 2 = 0.5 . Think of it as sharing 1 whole thing between 2 people - each gets half, which is 0.5.

How do I convert any fraction to a decimal?

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There are two main methods: Division (divide top by bottom) or Equivalent fractions (make the denominator 10, 100, etc.). For 12 \frac{1}{2} , both give 0.5!

What if the decimal doesn't end nicely?

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Some fractions like 13 \frac{1}{3} give repeating decimals (0.333...). For this problem, 12 \frac{1}{2} gives a terminating decimal 0.5, which ends cleanly.

How can I quickly recognize that 0.5 = 1/2?

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Think money! 0.5 dollars = 50 cents = half a dollar. Or think pizza: 0.5 of a pizza means you ate exactly half of it. These everyday examples help you remember 12=0.5 \frac{1}{2} = 0.5 .

Why multiply by 5 to get from 1/2 to 5/10?

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We need the denominator to be 10 to easily write as a decimal. Since 2×5=10 2 × 5 = 10 , we multiply both top and bottom by 5: 1×52×5=510=0.5 \frac{1×5}{2×5} = \frac{5}{10} = 0.5 .

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