Solution - Long subtraction
2,299,999,980
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | billions | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 2 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| - | 2 | 0 | ||||||||
2. Subtract the numbers using long subtraction method
Subtract the numbers in the ones column from the top number:
0-0=0
| Place value | billions | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 2 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| - | 2 | 0 | ||||||||
| 0 |
Because the upper digit (0) in the tens column is too small to get a positive difference, borrow 1 from the number to the left (3,000,000) which becomes (2,999,999) and get (10).
| Place value | billions | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 2 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | |||
| 2 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| - | 2 | 0 | ||||||||
| 0 |
Subtract the numbers in the tens column from the top number:
10-2=8
| Place value | billions | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 2 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | |||
| 2 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| - | 2 | 0 | ||||||||
| 8 | 0 |
Write 9 in the hundreds place.
| Place value | billions | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 2 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | |||
| 2 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| - | 2 | 0 | ||||||||
| 9 | 8 | 0 |
Write 9 in the thousands place.
| Place value | billions | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 2 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | |||
| 2 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| - | 2 | 0 | ||||||||
| 9 | 9 | 8 | 0 |
Write 9 in the ten thousands place.
| Place value | billions | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 2 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | |||
| 2 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| - | 2 | 0 | ||||||||
| 9 | 9 | 9 | 8 | 0 |
Write 9 in the hundred thousands place.
| Place value | billions | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 2 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | |||
| 2 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| - | 2 | 0 | ||||||||
| 9 | 9 | 9 | 9 | 8 | 0 |
Write 9 in the millions place.
| Place value | billions | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 2 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | |||
| 2 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| - | 2 | 0 | ||||||||
| 9 | 9 | 9 | 9 | 9 | 8 | 0 |
Write 9 in the ten millions place.
| Place value | billions | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 2 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | |||
| 2 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| - | 2 | 0 | ||||||||
| 9 | 9 | 9 | 9 | 9 | 9 | 8 | 0 |
Write 2 in the hundred millions place.
| Place value | billions | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 2 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | |||
| 2 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| - | 2 | 0 | ||||||||
| 2 | 9 | 9 | 9 | 9 | 9 | 9 | 8 | 0 |
Write 2 in the billions place.
| Place value | billions | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 2 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | |||
| 2 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| - | 2 | 0 | ||||||||
| 2 | 2 | 9 | 9 | 9 | 9 | 9 | 9 | 8 | 0 |
The solution is: 2,299,999,980
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