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39
Multiply the bags by their contents, then subtract nine.
Class 4 · English Version · Mathematics
Multi-step problems and checking
Explore multi-step problems and checking 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
Plan the order of operations from the story. Use an inverse calculation or an estimate to check the result.
Worked example
Five boxes hold 12 pencils each. After 8 pencils are used, 5 × 12 − 8 = 52 remain.
- 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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89
Multiply for three equal days, then add seventeen.
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41
Subtract those leaving and add those entering.
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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59
8×12−37=96−37=59.
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17
3×48−127=144−127=17.
Write in your own words. A guardian or teacher should review this response.
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Only the blue beads are in packs: 12+(8×5)=52 beads.
Match each operation to the quantities in the story.
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