Step-by-step examples of finding fractions of amounts using visual bar models.
Table showing math problems for finding fractions of 12 and 24 using visual bar models and calculation steps.
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Step-by-step solution for: Fractions of Amounts Using Bar Models - Starting Points Maths
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Show Answer Key & Explanations
Step-by-step solution for: Fractions of Amounts Using Bar Models - Starting Points Maths
Let's solve each problem step by step, following the pattern shown in the table. We'll use visual representation, working out, and then provide the answer.
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- Visual: Already given as three equal parts of 12: [4 | 4 | 4] → one part shaded.
- Working: $ 12 \div 3 = 4 $
- Answer: £4 ✔
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- Visual: Two out of three parts shaded: [4 | 4 | 4] → first two shaded
- Working:
$ 12 \div 3 = 4 $ (each third is 4)
$ 4 \times 2 = 8 $
- Answer: £8 ✔
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- Visual: All three parts shaded: [4 | 4 | 4] → all shaded
- Working:
$ 12 \div 3 = 4 $
$ 4 \times 3 = 12 $
- Answer: £12
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- Visual: Four equal parts of 12 → each part is $ 12 \div 4 = 3 $
So: [3 | 3 | 3 | 3] → one shaded
- Working:
$ 12 \div 4 = 3 $
- Answer: £3
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- Visual: Four equal parts: [3 | 3 | 3 | 3] → two shaded
- Working:
$ 12 \div 4 = 3 $
$ 3 \times 2 = 6 $
- Answer: £6
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- Visual: Four equal parts: [3 | 3 | 3 | 3] → three shaded
- Working:
$ 12 \div 4 = 3 $
$ 3 \times 3 = 9 $
- Answer: £9
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- Visual: Four equal parts of 24 → each part is $ 24 \div 4 = 6 $
So: [6 | 6 | 6 | 6] → all four shaded
- Working:
$ 24 \div 4 = 6 $
$ 6 \times 4 = 24 $
- Answer: £24
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This is an improper fraction — more than a whole.
- Visual: Four equal parts of 12 → each part is $ 12 \div 4 = 3 $
So: [3 | 3 | 3 | 3] → all four shaded, plus one extra part of 3 (since $ \frac{5}{4} = 1\frac{1}{4} $)
So visual should show five boxes: [3 | 3 | 3 | 3 | 3] → all shaded
- Working:
$ 12 \div 4 = 3 $
$ 3 \times 5 = 15 $
- Answer: £15
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| Question | Visual | Working | Answer |
|------------------------|----------------------------------------|------------------------------------------|--------|
| Find $ \frac{1}{3} $ of 12 | [4 | 4 | 4] → one shaded | $ 12 \div 3 = 4 $ | £4 |
| Find $ \frac{2}{3} $ of 12 | [4 | 4 | 4] → two shaded | $ 12 \div 3 = 4 $, $ 4 \times 2 = 8 $ | £8 |
| Find $ \frac{3}{3} $ of 12 | [4 | 4 | 4] → all shaded | $ 12 \div 3 = 4 $, $ 4 \times 3 = 12 $ | £12 |
| Find $ \frac{1}{4} $ of 12 | [3 | 3 | 3 | 3] → one shaded | $ 12 \div 4 = 3 $ | £3 |
| Find $ \frac{2}{4} $ of 12 | [3 | 3 | 3 | 3] → two shaded | $ 12 \div 4 = 3 $, $ 3 \times 2 = 6 $ | £6 |
| Find $ \frac{3}{4} $ of 12 | [3 | 3 | 3 | 3] → three shaded | $ 12 \div 4 = 3 $, $ 3 \times 3 = 9 $ | £9 |
| Find $ \frac{4}{4} $ of 24 | [6 | 6 | 6 | 6] → all shaded | $ 24 \div 4 = 6 $, $ 6 \times 4 = 24 $ | £24 |
| Find $ \frac{5}{4} $ of 12 | [3 | 3 | 3 | 3 | 3] → all five shaded | $ 12 \div 4 = 3 $, $ 3 \times 5 = 15 $ | £15 |
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To find a fraction of a number:
1. Divide the total by the denominator to get the value of one part.
2. Multiply that value by the numerator to get the final answer.
For example:
$ \frac{a}{b} $ of $ x $ = $ (x \div b) \times a $
This method works for proper and improper fractions.
✔ All answers are now complete!
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1. Find $ \frac{1}{3} $ of 12
- Visual: Already given as three equal parts of 12: [4 | 4 | 4] → one part shaded.
- Working: $ 12 \div 3 = 4 $
- Answer: £4 ✔
---
2. Find $ \frac{2}{3} $ of 12
- Visual: Two out of three parts shaded: [4 | 4 | 4] → first two shaded
- Working:
$ 12 \div 3 = 4 $ (each third is 4)
$ 4 \times 2 = 8 $
- Answer: £8 ✔
---
3. Find $ \frac{3}{3} $ of 12
- Visual: All three parts shaded: [4 | 4 | 4] → all shaded
- Working:
$ 12 \div 3 = 4 $
$ 4 \times 3 = 12 $
- Answer: £12
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4. Find $ \frac{1}{4} $ of 12
- Visual: Four equal parts of 12 → each part is $ 12 \div 4 = 3 $
So: [3 | 3 | 3 | 3] → one shaded
- Working:
$ 12 \div 4 = 3 $
- Answer: £3
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5. Find $ \frac{2}{4} $ of 12
- Visual: Four equal parts: [3 | 3 | 3 | 3] → two shaded
- Working:
$ 12 \div 4 = 3 $
$ 3 \times 2 = 6 $
- Answer: £6
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6. Find $ \frac{3}{4} $ of 12
- Visual: Four equal parts: [3 | 3 | 3 | 3] → three shaded
- Working:
$ 12 \div 4 = 3 $
$ 3 \times 3 = 9 $
- Answer: £9
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7. Find $ \frac{4}{4} $ of 24
- Visual: Four equal parts of 24 → each part is $ 24 \div 4 = 6 $
So: [6 | 6 | 6 | 6] → all four shaded
- Working:
$ 24 \div 4 = 6 $
$ 6 \times 4 = 24 $
- Answer: £24
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8. Find $ \frac{5}{4} $ of 12
This is an improper fraction — more than a whole.
- Visual: Four equal parts of 12 → each part is $ 12 \div 4 = 3 $
So: [3 | 3 | 3 | 3] → all four shaded, plus one extra part of 3 (since $ \frac{5}{4} = 1\frac{1}{4} $)
So visual should show five boxes: [3 | 3 | 3 | 3 | 3] → all shaded
- Working:
$ 12 \div 4 = 3 $
$ 3 \times 5 = 15 $
- Answer: £15
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✔ Final Completed Table:
| Question | Visual | Working | Answer |
|------------------------|----------------------------------------|------------------------------------------|--------|
| Find $ \frac{1}{3} $ of 12 | [4 | 4 | 4] → one shaded | $ 12 \div 3 = 4 $ | £4 |
| Find $ \frac{2}{3} $ of 12 | [4 | 4 | 4] → two shaded | $ 12 \div 3 = 4 $, $ 4 \times 2 = 8 $ | £8 |
| Find $ \frac{3}{3} $ of 12 | [4 | 4 | 4] → all shaded | $ 12 \div 3 = 4 $, $ 4 \times 3 = 12 $ | £12 |
| Find $ \frac{1}{4} $ of 12 | [3 | 3 | 3 | 3] → one shaded | $ 12 \div 4 = 3 $ | £3 |
| Find $ \frac{2}{4} $ of 12 | [3 | 3 | 3 | 3] → two shaded | $ 12 \div 4 = 3 $, $ 3 \times 2 = 6 $ | £6 |
| Find $ \frac{3}{4} $ of 12 | [3 | 3 | 3 | 3] → three shaded | $ 12 \div 4 = 3 $, $ 3 \times 3 = 9 $ | £9 |
| Find $ \frac{4}{4} $ of 24 | [6 | 6 | 6 | 6] → all shaded | $ 24 \div 4 = 6 $, $ 6 \times 4 = 24 $ | £24 |
| Find $ \frac{5}{4} $ of 12 | [3 | 3 | 3 | 3 | 3] → all five shaded | $ 12 \div 4 = 3 $, $ 3 \times 5 = 15 $ | £15 |
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🔍 Explanation Summary:
To find a fraction of a number:
1. Divide the total by the denominator to get the value of one part.
2. Multiply that value by the numerator to get the final answer.
For example:
$ \frac{a}{b} $ of $ x $ = $ (x \div b) \times a $
This method works for proper and improper fractions.
✔ All answers are now complete!
Parent Tip: Review the logic above to help your child master the concept of fraction bar worksheet.