Solution - Long subtraction
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 |
| 6 | 5 | 5 | 3 | 6 | 1 | 6 | 3 | 8 | 4 | |
| - | 4 | 0 | 9 | 6 | ||||||
2. Subtract the numbers using long subtraction method
Because the upper digit (4) in the ones column is too small to get a positive difference, borrow 1 from the digit (8) in the next number place which becomes (7) and get (14).
| Place value | billions | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 7 | 14 | |||||||||
| 6 | 5 | 5 | 3 | 6 | 1 | 6 | 3 | 8 | 4 | |
| - | 4 | 0 | 9 | 6 | ||||||
Subtract the numbers in the ones column from the top number:
14-6=8
| Place value | billions | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 7 | 14 | |||||||||
| 6 | 5 | 5 | 3 | 6 | 1 | 6 | 3 | 8 | 4 | |
| - | 4 | 0 | 9 | 6 | ||||||
| 8 |
Because the upper digit (7) in the tens column is too small to get a positive difference, borrow 1 from the digit (3) in the next number place which becomes (2) and get (17).
| Place value | billions | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 2 | 17 | |||||||||
| 7 | 14 | |||||||||
| 6 | 5 | 5 | 3 | 6 | 1 | 6 | 3 | 8 | 4 | |
| - | 4 | 0 | 9 | 6 | ||||||
| 8 |
Subtract the numbers in the tens column from the top number:
17-9=8
| Place value | billions | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 2 | 17 | |||||||||
| 7 | 14 | |||||||||
| 6 | 5 | 5 | 3 | 6 | 1 | 6 | 3 | 8 | 4 | |
| - | 4 | 0 | 9 | 6 | ||||||
| 8 | 8 |
Subtract the numbers in the hundreds column from the top number:
2-0=2
| Place value | billions | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 2 | 17 | |||||||||
| 7 | 14 | |||||||||
| 6 | 5 | 5 | 3 | 6 | 1 | 6 | 3 | 8 | 4 | |
| - | 4 | 0 | 9 | 6 | ||||||
| 2 | 8 | 8 |
Subtract the numbers in the thousands column from the top number:
6-4=2
| Place value | billions | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 2 | 17 | |||||||||
| 7 | 14 | |||||||||
| 6 | 5 | 5 | 3 | 6 | 1 | 6 | 3 | 8 | 4 | |
| - | 4 | 0 | 9 | 6 | ||||||
| 2 | 2 | 8 | 8 |
Write 1 in the ten thousands place.
| Place value | billions | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 2 | 17 | |||||||||
| 7 | 14 | |||||||||
| 6 | 5 | 5 | 3 | 6 | 1 | 6 | 3 | 8 | 4 | |
| - | 4 | 0 | 9 | 6 | ||||||
| 1 | 2 | 2 | 8 | 8 |
Write 6 in the hundred thousands place.
| Place value | billions | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 2 | 17 | |||||||||
| 7 | 14 | |||||||||
| 6 | 5 | 5 | 3 | 6 | 1 | 6 | 3 | 8 | 4 | |
| - | 4 | 0 | 9 | 6 | ||||||
| 6 | 1 | 2 | 2 | 8 | 8 |
Write 3 in the millions place.
| Place value | billions | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 2 | 17 | |||||||||
| 7 | 14 | |||||||||
| 6 | 5 | 5 | 3 | 6 | 1 | 6 | 3 | 8 | 4 | |
| - | 4 | 0 | 9 | 6 | ||||||
| 3 | 6 | 1 | 2 | 2 | 8 | 8 |
Write 5 in the ten millions place.
| Place value | billions | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 2 | 17 | |||||||||
| 7 | 14 | |||||||||
| 6 | 5 | 5 | 3 | 6 | 1 | 6 | 3 | 8 | 4 | |
| - | 4 | 0 | 9 | 6 | ||||||
| 5 | 3 | 6 | 1 | 2 | 2 | 8 | 8 |
Write 5 in the hundred millions place.
| Place value | billions | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 2 | 17 | |||||||||
| 7 | 14 | |||||||||
| 6 | 5 | 5 | 3 | 6 | 1 | 6 | 3 | 8 | 4 | |
| - | 4 | 0 | 9 | 6 | ||||||
| 5 | 5 | 3 | 6 | 1 | 2 | 2 | 8 | 8 |
Write 6 in the billions place.
| Place value | billions | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 2 | 17 | |||||||||
| 7 | 14 | |||||||||
| 6 | 5 | 5 | 3 | 6 | 1 | 6 | 3 | 8 | 4 | |
| - | 4 | 0 | 9 | 6 | ||||||
| 6 | 5 | 5 | 3 | 6 | 1 | 2 | 2 | 8 | 8 |
The solution is: 6,553,612,288
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