Solution - Long subtraction
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 1 | 1 | 7 | 6 | 0 | 6 | 8 | 8 | |
| - | 3 | 8 | 2 | 0 | 4 | 8 | ||
2. Subtract the numbers using long subtraction method
Subtract the numbers in the ones column from the top number:
8-8=0
| Place value | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 1 | 1 | 7 | 6 | 0 | 6 | 8 | 8 | |
| - | 3 | 8 | 2 | 0 | 4 | 8 | ||
| 0 |
Subtract the numbers in the tens column from the top number:
8-4=4
| Place value | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 1 | 1 | 7 | 6 | 0 | 6 | 8 | 8 | |
| - | 3 | 8 | 2 | 0 | 4 | 8 | ||
| 4 | 0 |
Subtract the numbers in the hundreds column from the top number:
6-0=6
| Place value | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 1 | 1 | 7 | 6 | 0 | 6 | 8 | 8 | |
| - | 3 | 8 | 2 | 0 | 4 | 8 | ||
| 6 | 4 | 0 |
Because the upper digit (0) in the thousands column is too small to get a positive difference, borrow 1 from the digit (6) in the next number place which becomes (5) and get (10).
| Place value | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 5 | 10 | |||||||
| 1 | 1 | 7 | 6 | 0 | 6 | 8 | 8 | |
| - | 3 | 8 | 2 | 0 | 4 | 8 | ||
| 6 | 4 | 0 |
Subtract the numbers in the thousands column from the top number:
10-2=8
| Place value | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 5 | 10 | |||||||
| 1 | 1 | 7 | 6 | 0 | 6 | 8 | 8 | |
| - | 3 | 8 | 2 | 0 | 4 | 8 | ||
| 8 | 6 | 4 | 0 |
Because the upper digit (5) in the ten thousands 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 (15).
| Place value | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 6 | 15 | |||||||
| 5 | 10 | |||||||
| 1 | 1 | 7 | 6 | 0 | 6 | 8 | 8 | |
| - | 3 | 8 | 2 | 0 | 4 | 8 | ||
| 8 | 6 | 4 | 0 |
Subtract the numbers in the ten thousands column from the top number:
15-8=7
| Place value | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 6 | 15 | |||||||
| 5 | 10 | |||||||
| 1 | 1 | 7 | 6 | 0 | 6 | 8 | 8 | |
| - | 3 | 8 | 2 | 0 | 4 | 8 | ||
| 7 | 8 | 6 | 4 | 0 |
Subtract the numbers in the hundred thousands column from the top number:
6-3=3
| Place value | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 6 | 15 | |||||||
| 5 | 10 | |||||||
| 1 | 1 | 7 | 6 | 0 | 6 | 8 | 8 | |
| - | 3 | 8 | 2 | 0 | 4 | 8 | ||
| 3 | 7 | 8 | 6 | 4 | 0 |
Write 1 in the millions place.
| Place value | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 6 | 15 | |||||||
| 5 | 10 | |||||||
| 1 | 1 | 7 | 6 | 0 | 6 | 8 | 8 | |
| - | 3 | 8 | 2 | 0 | 4 | 8 | ||
| 1 | 3 | 7 | 8 | 6 | 4 | 0 |
Write 1 in the ten millions place.
| Place value | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 6 | 15 | |||||||
| 5 | 10 | |||||||
| 1 | 1 | 7 | 6 | 0 | 6 | 8 | 8 | |
| - | 3 | 8 | 2 | 0 | 4 | 8 | ||
| 1 | 1 | 3 | 7 | 8 | 6 | 4 | 0 |
The solution is: 11,378,640
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