Test your skills: commas in large numbers assessment.

📚 Quick Study Guide

• 🔢 The Basics: Commas are used to separate large numbers into groups of three digits, starting from the right.
• 📍 Placement Rule: Place a comma after every three digits, moving from right to left (ones, tens, hundreds, *comma*, thousands, ten thousands, hundred thousands, *comma*, millions, etc.).
• 🌍 International Variations: While periods are sometimes used instead of commas in other countries, this guide focuses on the standard US/UK comma usage.
• ✅ No Comma Zone: Four-digit numbers (1000 to 9999) generally do not use a comma.
• 💡 Example: 1,234,567 represents one million, two hundred thirty-four thousand, five hundred sixty-seven.

Practice Quiz

1. Which of the following numbers is correctly formatted with commas?
   1. 1234567
   2. 1,23,45,67
   3. 1,234,567
   4. 123,456,7
2. Which of the following numbers requires a comma?
   1. 999
   2. 1000
   3. 9999
   4. 10000
3. How would you correctly write the number one million using commas?
   1. 1000000
   2. 1,00,000
   3. 10,00,000
   4. 1,000,000
4. What is the place value of the digit immediately to the left of the first comma in the number 12,345,678?
   1. Thousands
   2. Ten Thousands
   3. Hundred Thousands
   4. Millions
5. Which number is written incorrectly?
   1. 1,000
   2. 10,000
   3. 100,000
   4. 1,0,00,000
6. Choose the correctly formatted number:
   1. 100000
   2. 100,0,00
   3. 10,00,00
   4. 100,000
7. What does the number 5,280 represent?
   1. Five hundred and twenty-eight
   2. Five thousand two hundred and eighty
   3. Fifty-two thousand and eighty
   4. Five hundred twenty thousand