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Multiplying by 10 or 100 is easy. 5 is half of 10, 50 is half of 100 and 25 is a quarter of 100 — so multiply by 10 or 100 and then halve.
✓ You passed this lesson’s test.
Use 10 and 100 — “5 is half of 10, 50 is half of 100, 25 is a quarter of 100”
Use it for: Money (25 paise, ₹50 notes), quarters, and quick checks of bigger sums.
Check: 36 × 25 = 9 × 4 × 25 = 9 × 100 = 900 ✓
Work it out in your head or on paper, type the answer and press Check. Stuck? Press “Show me how”.
Right: 0 · Tried: 0
20 questions. Check each answer, then go to the next one. Get 16 or more right to pass.
🏅 Sign in with Google to earn the 💰 Money Multiplier badge when you pass — and a certificate when you finish all 9 lessons of Module 3 · Multiplication strategies. You can still take the test without signing in.
Why does it work? When should you use it? Ask in English, मराठी or हिंदी.
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