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A subtraction word problem can ask how many remain after some are removed, or how many more one group has than another. First explain what the quantities represent. Then show the relationship with objects or a drawing before writing the calculation.
This Primary 1 Mathematics guide uses small original stories and counters to connect meaning with subtraction. Start with taking away before comparing two groups. A word such as more does not by itself decide the operation; the question and the known quantities matter.
Valour Primary's 2026 Mathematics overview includes P1 subtraction. MOE's Mathematics syllabus updated October 2025 is the national reference; its direct download presented a verification screen during this series. These are original teaching examples, not official questions or a complete syllabus audit. Follow the school's current number range and method.
“There are 8 apples in a basket. Three apples are taken out. How many remain?” Eight describes the starting group. Three describes the removed part. The question asks about the part left in the basket.
Ask the child to tell the story in their own words. A correct calculation copied from an adult does not show whether the child understands what remains means. Read aloud or act out the situation when the wording is the uncertain step.
Place eight counters in a group. Move three away and count the five still in the group. Write 8 − 3 = 5 and say “Eight take away three leaves five.”
Do not count the removed counters again when answering how many remain. Keep the two parts visibly separate. The five represents the group left, not the amount taken away.
For “Mei has 7 balloons. Two burst”, draw seven circles and cross out two. Count the five uncrossed circles. Number sentence: 7 − 2 = 5.
The drawing need not be elaborate. Its job is to preserve the original quantity, show the removed part and make the remaining part visible. Do not cross out all seven and then redraw a guessed answer.
Ravi has 6 counters and Lina has 4. Arrange the groups in two rows and match one counter from each row. Four pairs can be made, leaving two unmatched counters in Ravi's row.
Ravi has two more counters: 6 − 4 = 2. No counters have been taken away in the story. Subtraction finds the difference between the groups, so it can describe a comparison as well as removal.
“Ravi has 6 counters and Lina has 4. How many do they have altogether?” asks for the combined total: 6 + 4 = 10. “How many more does Ravi have?” asks for the difference: 6 − 4 = 2.
The quantities are unchanged; the question changes the relationship being found. Avoid teaching that more always means addition. Ask the child to point to the total or the unmatched part in the model.
If eight apples started in the basket and three were removed, the answer five can be checked with 5 + 3 = 8. The remaining and removed parts together rebuild the starting group.
For the comparison, the smaller group of four plus the difference of two reaches the larger group of six. The check uses the same quantities in a connected relationship, rather than starting a different story.
- Nine pencils are on a table. Four are moved to a box. How many remain on the table?
- A child has 6 stickers and gives away 2. How many are left?
- Ben has 7 counters and Ali has 5. How many more does Ben have?
- Ben has 7 counters and Ali has 5. How many do they have altogether?
Answers: 1. 9 − 4 = 5 pencils. 2. 6 − 2 = 4 stickers. 3. 7 − 5 = 2 counters. 4. 7 + 5 = 12 counters. The last two questions deliberately use the same amounts but ask for different relationships.
If the child understands the story but loses count, arrange counters neatly and touch each once. If the operation is guessed, return to acting out or matching groups. If the calculation is secure, ask for an explanation without moving the counters.
Use one short independent return question after the worked example. Explain what the answer counts and include the unit. The aim is a clear connection between the story, the model and the number sentence.