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1/2
Four eighths simplify to one half.
Class 3 · English Medium · Cambridge · Mathematics
Adding and subtracting simple fractions
Explore adding and subtracting simple fractions with an example and your own answers.
About this lesson and its coverage
Original Kidemy foundation practice · Read the example, write your answers, then check. This starter is shared across class versions; it is not a complete board-specific lesson or course.
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Learn the idea
When denominators are the same, add or subtract the numerators and keep the denominator. Simplify when possible.
Worked example
2/7 + 3/7 = 5/7. The pieces are still sevenths.
- Read the example and explain which rule or evidence it uses.
- Try each task yourself, then compare the answer and its reason.
Your written practice
Show your working on paper. Check your answer, then choose Next.
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1/2
Three sixths simplify to one half.
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2/3
Six ninths simplify to two thirds.
Take it further
Apply the idea in a new situation and explain your method. Open writing needs a guardian or teacher to review it.
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1/2
Five tenths equal one half.
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1/2
Four eighths equal one half.
Write in your own words. A guardian or teacher should review this response.
Show model answer and explanation
The pieces stay fifths, so add only the numerators: 3/5. Adding the denominators changes the piece size.
Use equal-sized parts in the explanation.
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