Difference Doodles
The gap between two counts is a positive difference. A line or bar model can show how much must be added to the smaller count to reach the larger.
Before you try
Before you play, make a prediction: The gap between 800 and 1050 is… 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 10: Elephants, Tigers and Leopards, pages 149–163).
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Try these ideas
- Join the two count markers and read the gap in equal intervals.
- 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
The gap between two counts is a positive difference. A line or bar model can show how much must be added to the smaller count to reach the larger.
The gap from 250 to 400 is 150. Join the two count markers and read the gap in equal intervals.
A visual gap only represents a number correctly when the scale intervals are consistent.
This activity connects to Elephants, Tigers and Leopards, NCERT Class 4 maths, printed pages 149–163. 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: Show the difference between 350 and 600 on a number line. Both values belong on the same equally spaced scale. The gap is 600 − 350 = 250. Joining the markers shows that positive difference.
Check your understanding
Question 1 of 2
The gap between 800 and 1050 is…
Which continues 2,000, 1,900, 1,800?
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. Join the two count markers and read the gap in equal intervals. Ask the child to make a new example using paper, counters, household objects or a labelled sketch.
- Listen to the explanation. A visual gap only represents a number correctly when the scale intervals are consistent. Ask “How could we check?” and encourage a second representation of the same idea.