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To multiply by a 2-digit number, split it into tens and ones. 234 × 23 = 234 × 20 + 234 × 3 = 4680 + 702 = 5382. Multiplying by 10, 100 or 1000 just puts 1, 2 or 3 zeros at the end.
✓ You passed this lesson’s test.
Split the multiplier — “multiply by the tens and by the ones of the 2-digit number, then add”
Use it for: Costs of many things, eggs in cartons, passengers in trains, and the multiplication chapter of Class 4 maths.
Check: Estimate: 234 × 23 is near 200 × 25 = 5000, so 5382 is sensible ✓
▶ Watch it animatedWork it out in your head or on paper, type the answer and press Check. Stuck? Press “Show me how”.
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20 sums. Check each answer, then go to the next one. Get 16 or more right to pass.
🏅 Sign in with Google to earn the 🏗️ Long Multiplier badge when you pass — and a certificate when you finish all 8 lessons of Part 4 · Class 4. You can still take the test without signing in.
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