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6
Remove four from ten.
Class 1 · English Version · Mathematics
Subtraction and missing numbers
Explore subtraction and missing numbers 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
Subtraction finds what is left or a difference. Use addition to check a missing number.
Worked example
There are 9 balloons. If 3 are removed, 6 remain: 9 − 3 = 6.
- 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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5
Five and three make eight.
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2
Seven minus five is two.
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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8
Take four to reach ten, then two more.
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11
Add four to seven to find the starting number.
Write in your own words. A guardian or teacher should review this response.
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9+5=14, so 9 cannot be right. 7+5=12, so 12−5=7.
Show an addition check, not only the corrected answer.
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