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Topic Content:
- Counting in Millions, Billions and Trillions
- Worked Examples
- Big Number Rush
- Final Evaluation
| Power of ten | Number | Name |
| 3 | 1 000 | Thousand |
| 6 | 1 000 000 | Million |
| 9 | 1 000 000 000 | Billion |
| 12 | 1 000 000 000 000 | Trillion |
We use the words million, billion, and trillion for large numbers.
They are connected as follows:
1 million = 1 thousand × 1000
1 billion = 1 million × 1000
1 trillion = 1 billion × 1000
Worked Example 1.2.1:
Write 2 468 900 in words.
Solution
2 000 000 = Two million
468 000 = Four hundred and sixty-eight thousand
900 = Nine hundred
Answer: 2 468 900 = Two million, four hundred and sixty-eight thousand, nine hundred.
Worked Example 1.2.2:
Write the number 3 184 200 940 in words.
Solution
3 000 000 000 = Three billion
184 000 000 = One hundred and eighty-four million
200 000 = Two hundred thousand
900 = Nine hundred
40 = Forty
Answer: 3 184 200 940 – Three billion, one hundred and eighty-four million, two hundred thousand, nine hundred and forty.
Worked Example 1.2.3
Write eleven trillion eight hundred and one billion, three million, five thousand, and ninety-eight in figures.
Solution
Eleven trillion = 11 000 000 000 000
Eight hundred and one billion = 801 000 000 000
Three million = 3 000 000
Five thousand and ninety-eight = 5 098
Answer: Eleven trillion eight hundred and one billion, three million, five thousand, and ninety-eight in figures = 11,801,003,005,098
Quick Check:
a. How many zeros are in one billion?
View AnswerQuick Check:
How many zeros are in one trillion?
View Answer
⚡ Big Number Rush
Pick the correct answer as fast as you can.
Final Evaluation:
1. Write six million, four hundred thousand in figures.
2. Write three billion, twenty million, five thousand in figures.
3. What is the correct name for a thousand thousand?
4. What is the correct name for a thousand million?
5. What is the correct name for a million million?
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