Coach Constructors
Multiplication finds total seats across equal coaches. Splitting a two-digit factor into tens and ones makes partial products easier to combine.
Before you try
Before you play, make a prediction: 12 × 15 equals… 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
- Set the total seats using the split coach groups as a guide.
- 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
Multiplication finds total seats across equal coaches. Splitting a two-digit factor into tens and ones makes partial products easier to combine.
12 × 14 = 10 × 14 + 2 × 14 = 140 + 28 = 168. Set the total seats using the split coach groups as a guide.
Keep place value in partial products: ten coaches contain ten times the seats of one coach.
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: There are 14 coaches with 24 seats each. Find the total seats. Split 14 into 10 + 4. The partial products are 10 × 24 = 240 and 4 × 24 = 96. Add 240 + 96 = 336 seats.
Check your understanding
Question 1 of 2
12 × 15 equals…
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. Set the total seats using the split coach groups as a guide. Ask the child to make a new example using paper, counters, household objects or a labelled sketch.
- Listen to the explanation. Keep place value in partial products: ten coaches contain ten times the seats of one coach. Ask “How could we check?” and encourage a second representation of the same idea.