Pour Patrol
Capacity describes how much a container holds. One litre equals 1000 millilitres. Add cup volumes to find the total poured.
Before you try
Before you play, make a prediction: Two 500 mL cups hold… Explain what you expect and what part of the model will help you check it.
Try it out
Interactive activity
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What happened?
Move a control to see what changes and why.
The game practises one idea at a time with simple drawn pictures. Check the same idea with real objects and your NCERT textbook (Chapter 8: Weigh It, Pour It, pages 115–127).
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Try these ideas
- Try reaching the same target with different cup sizes.
- Try a new puzzle with ↻. Describe what changed and which mathematical rule stayed the same.
- Complete a round, then explain your method before you move to the next one.
Why it works
Capacity describes how much a container holds. One litre equals 1000 millilitres. Add cup volumes to find the total poured.
Four 250 mL cups fill one litre. Two 500 mL cups do the same. Try reaching the same target with different cup sizes.
Container height alone does not determine capacity; read the calibrated scale.
This activity connects to Weigh It, Pour It, NCERT Class 4 maths, printed pages 115–127. Use the picture or objects to explain each step before relying on a calculation. The game practises one part of the chapter at a time; the other three activities extend the chapter’s ideas.
Worked example: How many 250 mL cups fill a 1 L jug? 1 L = 1000 mL. 1000 ÷ 250 = 4 cups. Check with repeated addition: 250 + 250 + 250 + 250.
Check your understanding
Question 1 of 2
Two 500 mL cups hold…
A quarter of one litre is…
Explain it in your own words
What changed? Why did it happen? Where might you notice this in everyday life?
For parents & teachers
- Try with everyday materials. Try reaching the same target with different cup sizes. Ask the child to make a new example using paper, counters, household objects or a labelled sketch.
- Listen to the explanation. Container height alone does not determine capacity; read the calibrated scale. Ask “How could we check?” and encourage a second representation of the same idea.