Route Racers
Route length is the sum of the road lengths travelled. A direct-looking route on a sketch need not be the shortest; read the labels.
Before you try
Before you play, make a prediction: A 12 km road followed by an 8 km road totals… 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 13: The Transport Museum, pages 184–202).
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Try these ideas
- Choose a route, add its distance and compare it with the other path.
- 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
Route length is the sum of the road lengths travelled. A direct-looking route on a sketch need not be the shortest; read the labels.
Roads of 12 km and 18 km total 30 km. Compare that with an alternative 34 km route. Choose a route, add its distance and compare it with the other path.
A sketch may not be to scale. Use road labels, not apparent line length, to compare distances.
This activity connects to The Transport Museum, NCERT Class 4 maths, printed pages 184–202. 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: One route has roads of 18 km and 24 km. Another has roads of 20 km and 25 km. Which is shorter? First route: 18 + 24 = 42 km. Second route: 20 + 25 = 45 km. The first is shorter by 45 − 42 = 3 km.
Check your understanding
Question 1 of 2
A 12 km road followed by an 8 km road totals…
Three 24-seat coaches provide…
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. Choose a route, add its distance and compare it with the other path. Ask the child to make a new example using paper, counters, household objects or a labelled sketch.
- Listen to the explanation. A sketch may not be to scale. Use road labels, not apparent line length, to compare distances. Ask “How could we check?” and encourage a second representation of the same idea.