The Zero-Tastic Multiplication Trick
Did you know multiplying numbers with zeroes at the end can be super easy?
When numbers end with zeroes, you can use a special shortcut to multiply them quickly without all the extra steps. It's like having a math superpower!
How to Multiply Numbers with Trailing Zeroes
1️⃣ Count the zeroes at the end of both numbers
2️⃣ Multiply the numbers without the zeroes
3️⃣ Add all the zeroes back at the end of your answer
Let's Try Some Examples!
Example 1: 30 × 400
Step 1: Count the zeroes → 30 (1 zero) and 400 (2 zeros) → Total 3 zeros
Step 2: Multiply without zeroes → 3 × 4 = 12
Step 3: Add the zeros back → 12 + "000" = Show answer
12,000
Example 2: 500 × 6,000
Step 1: Count the zeroes → 500 (2 zeros) and 6,000 (3 zeros) → Total 5 zeros
Step 2: Multiply without zeroes → 5 × 6 = 30
Step 3: Add the zeros back → 30 + "00000" = Show answer
3,000,000
Parent Tips 🌟
- Real-world practice: When shopping, ask your child to calculate totals for multiple items priced with zeroes (like $20 items).
- Zero hunt game: Make it fun by having them find numbers with trailing zeroes in newspapers or ads and practice multiplying them.
- Speed challenge: Time how fast they can solve 10 multiplication problems with trailing zeroes and try to beat their record.