Multiplication Review and Challenge

🎯 What You'll Learn

You will review all multiplication skills and challenge yourself with harder problems.

🏪 Market Story

Mrs. Okafor announces a multiplication challenge. "Whoever solves the most problems wins a prize!" The class is excited. Amina, Chidi, Bola, Emeka, Tunde, and Funke are all ready. Are you?

📝 Let's Learn

Review of multiplication strategies:

• Times 2: Double the number.
• Times 5: Answers end in 0 or 5.
• Times 10: Add a zero.
• Times 4: Double-double.
• Times 3: Digits add to 3, 6, or 9.
• Times 1: Same number. Times 0: Always 0.
• Partitioning: Split the bigger number and multiply each part.

Challenge 1: 7 × 8 = ? Think: 7 × 8 = 7 × (4 + 4) = 28 + 28 = 56. Or just remember: 5, 6, 7, 8 → 56 = 7 × 8!

Challenge 2: 6 × 15. Partition: 6 × 10 + 6 × 5 = 60 + 30 = 90.

Challenge 3: A school orders 8 boxes of chalk. Each box has 24 pieces. How many pieces? 8 × 24 = 8 × 20 + 8 × 4 = 160 + 32 = 192 pieces.

✏️ Practice Questions

1. What is 9 × 7?
2. What is 5 × 36?
3. Tunde buys 7 items at ₦45 each. What is the total cost?

Click to see answers

1. 9 × 7 = 63.
2. 5 × 36 = 5 × 30 + 5 × 6 = 150 + 30 = 180.
3. 7 × ₦45 = 7 × 40 + 7 × 5 = 280 + 35 = ₦315.

💡 Remember

Multiplication is one of the most useful skills in maths. You use it every day at the market, in school, and in life. Keep practising your times tables until they become automatic!