🔵Reading & Writing Large Numbers
Large numbers are grouped to make them easy to read. In the Indian system we use lakhs and crores: 1 lakh = 1,00,000 and 1 crore = 1,00,00,000. In the international system we use the million: 1 million = 1,000,000.
Each digit has a place value. In 3,45,678 the 3 is in the lakhs place (3,00,000).
👀 See a worked example
Write 1 lakh in digits.
1,00,000 (a 1 followed by five zeros).
What is the place value of 4 in 3,45,678?
4 is in the ten-thousands place → 40,000.
🤖 Vidi's Key Points
- 1 lakh = 1,00,000; 1 crore = 1,00,00,000; 1 million = 1,000,000.
- Group digits to read large numbers easily.
- Each digit's value depends on its place.
🟢Comparing & Rounding Large Numbers
Compare large numbers by digit count first, then from the left. To round, look at the digit to the right of the rounding place: 5 or more rounds up, 4 or less rounds down.
👀 See a worked example
Round 47,800 to the nearest thousand.
Hundreds digit 8 → round up to 48,000.
Which is greater: 2,45,000 or 2,54,000?
Thousands place 4 < 5, so 2,54,000 is greater.
🤖 Vidi's Key Points
- Compare by digit count, then from the left.
- Round: 5 or more up, 4 or less down.
- Look at the digit to the right of the rounding place.
🎯 Mission Test
Ready, Maths Hero? Take the chapter test to show what you've learned!
Start the Chapter Test →