Solution - Long subtraction
120,138
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 2 | 5 | 6 | 8 | 0 | 5 | |
| - | 1 | 3 | 6 | 6 | 6 | 7 |
2. Subtract the numbers using long subtraction method
Because the upper digit (5) in the ones column is too small to get a positive difference, borrow 1 from the number to the left (80) which becomes (79) and get (15).
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 7 | 9 | 15 | ||||
| 2 | 5 | 6 | 8 | 0 | 5 | |
| - | 1 | 3 | 6 | 6 | 6 | 7 |
Subtract the numbers in the ones column from the top number:
15-7=8
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 7 | 9 | 15 | ||||
| 2 | 5 | 6 | 8 | 0 | 5 | |
| - | 1 | 3 | 6 | 6 | 6 | 7 |
| 8 |
Subtract the numbers in the tens column from the top number:
9-6=3
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 7 | 9 | 15 | ||||
| 2 | 5 | 6 | 8 | 0 | 5 | |
| - | 1 | 3 | 6 | 6 | 6 | 7 |
| 3 | 8 |
Subtract the numbers in the hundreds column from the top number:
7-6=1
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 7 | 9 | 15 | ||||
| 2 | 5 | 6 | 8 | 0 | 5 | |
| - | 1 | 3 | 6 | 6 | 6 | 7 |
| 1 | 3 | 8 |
Subtract the numbers in the thousands column from the top number:
6-6=0
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 7 | 9 | 15 | ||||
| 2 | 5 | 6 | 8 | 0 | 5 | |
| - | 1 | 3 | 6 | 6 | 6 | 7 |
| 0 | 1 | 3 | 8 |
Subtract the numbers in the ten thousands column from the top number:
5-3=2
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 7 | 9 | 15 | ||||
| 2 | 5 | 6 | 8 | 0 | 5 | |
| - | 1 | 3 | 6 | 6 | 6 | 7 |
| 2 | 0 | 1 | 3 | 8 |
Subtract the numbers in the hundred thousands column from the top number:
2-1=1
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 7 | 9 | 15 | ||||
| 2 | 5 | 6 | 8 | 0 | 5 | |
| - | 1 | 3 | 6 | 6 | 6 | 7 |
| 1 | 2 | 0 | 1 | 3 | 8 |
The solution is: 120,138
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