Topic Content:
- Counting in Millions, Billions and Trillions
- Worked Examples
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 = 11,801,003,005,090
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