Solution - Long subtraction
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 5 | 8 | 4 | 5 | 2 | 4 | 7 | 6 | 8 | |
| 9 | 6 | 5 | 1 | ||||||
| - | 7 | 3 | 2 | 5 | |||||
2. Subtract the numbers using long subtraction method
Subtract the numbers in the ones column from the top number:
8-1-5=2
| Place value | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 5 | 8 | 4 | 5 | 2 | 4 | 7 | 6 | 8 | |
| 9 | 6 | 5 | 1 | ||||||
| - | 7 | 3 | 2 | 5 | |||||
| 2 |
Because the upper digit (6) in the tens column is too small to get a positive difference, borrow 1 from the digit (7) in the next number place which becomes (6) and get (16).
| Place value | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 6 | 16 | ||||||||
| 5 | 8 | 4 | 5 | 2 | 4 | 7 | 6 | 8 | |
| 9 | 6 | 5 | 1 | ||||||
| - | 7 | 3 | 2 | 5 | |||||
| 2 |
Subtract the numbers in the tens column from the top number:
16-5-2=9
| Place value | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 6 | 16 | ||||||||
| 5 | 8 | 4 | 5 | 2 | 4 | 7 | 6 | 8 | |
| 9 | 6 | 5 | 1 | ||||||
| - | 7 | 3 | 2 | 5 | |||||
| 9 | 2 |
Because the upper digit (6) in the hundreds column is too small to get a positive difference, borrow 1 from the digit (4) in the next number place which becomes (3) and get (16).
| Place value | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 3 | 16 | ||||||||
| 6 | 16 | ||||||||
| 5 | 8 | 4 | 5 | 2 | 4 | 7 | 6 | 8 | |
| 9 | 6 | 5 | 1 | ||||||
| - | 7 | 3 | 2 | 5 | |||||
| 9 | 2 |
Subtract the numbers in the hundreds column from the top number:
16-6-3=7
| Place value | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 3 | 16 | ||||||||
| 6 | 16 | ||||||||
| 5 | 8 | 4 | 5 | 2 | 4 | 7 | 6 | 8 | |
| 9 | 6 | 5 | 1 | ||||||
| - | 7 | 3 | 2 | 5 | |||||
| 7 | 9 | 2 |
Because the upper digit (3) in the thousands column is too small to get a positive difference, borrow 2 from the digit (2) in the next number place which becomes (0) and get (23).
| Place value | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 0 | 23 | ||||||||
| 3 | 16 | ||||||||
| 6 | 16 | ||||||||
| 5 | 8 | 4 | 5 | 2 | 4 | 7 | 6 | 8 | |
| 9 | 6 | 5 | 1 | ||||||
| - | 7 | 3 | 2 | 5 | |||||
| 7 | 9 | 2 |
Subtract the numbers in the thousands column from the top number:
23-9-7=7
| Place value | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 0 | 23 | ||||||||
| 3 | 16 | ||||||||
| 6 | 16 | ||||||||
| 5 | 8 | 4 | 5 | 2 | 4 | 7 | 6 | 8 | |
| 9 | 6 | 5 | 1 | ||||||
| - | 7 | 3 | 2 | 5 | |||||
| 7 | 7 | 9 | 2 |
Write 0 in the ten thousands place.
| Place value | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 0 | 23 | ||||||||
| 3 | 16 | ||||||||
| 6 | 16 | ||||||||
| 5 | 8 | 4 | 5 | 2 | 4 | 7 | 6 | 8 | |
| 9 | 6 | 5 | 1 | ||||||
| - | 7 | 3 | 2 | 5 | |||||
| 0 | 7 | 7 | 9 | 2 |
Write 5 in the hundred thousands place.
| Place value | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 0 | 23 | ||||||||
| 3 | 16 | ||||||||
| 6 | 16 | ||||||||
| 5 | 8 | 4 | 5 | 2 | 4 | 7 | 6 | 8 | |
| 9 | 6 | 5 | 1 | ||||||
| - | 7 | 3 | 2 | 5 | |||||
| 5 | 0 | 7 | 7 | 9 | 2 |
Write 4 in the millions place.
| Place value | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 0 | 23 | ||||||||
| 3 | 16 | ||||||||
| 6 | 16 | ||||||||
| 5 | 8 | 4 | 5 | 2 | 4 | 7 | 6 | 8 | |
| 9 | 6 | 5 | 1 | ||||||
| - | 7 | 3 | 2 | 5 | |||||
| 4 | 5 | 0 | 7 | 7 | 9 | 2 |
Write 8 in the ten millions place.
| Place value | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 0 | 23 | ||||||||
| 3 | 16 | ||||||||
| 6 | 16 | ||||||||
| 5 | 8 | 4 | 5 | 2 | 4 | 7 | 6 | 8 | |
| 9 | 6 | 5 | 1 | ||||||
| - | 7 | 3 | 2 | 5 | |||||
| 8 | 4 | 5 | 0 | 7 | 7 | 9 | 2 |
Write 5 in the hundred millions place.
| Place value | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 0 | 23 | ||||||||
| 3 | 16 | ||||||||
| 6 | 16 | ||||||||
| 5 | 8 | 4 | 5 | 2 | 4 | 7 | 6 | 8 | |
| 9 | 6 | 5 | 1 | ||||||
| - | 7 | 3 | 2 | 5 | |||||
| 5 | 8 | 4 | 5 | 0 | 7 | 7 | 9 | 2 |
The solution is: 584,507,792
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