Solution - Long subtraction
3,623
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
Place value | thousands | hundreds | tens | ones |
3 | 7 | 1 | 8 | |
8 | ||||
- | 8 | 7 | ||
2. Subtract the numbers using long subtraction method
Because the upper digit (8) in the ones column is too small to get a positive difference, borrow 1 from the digit (1) in the next number place which becomes (0) and get (18).
Place value | thousands | hundreds | tens | ones |
0 | 18 | |||
3 | 7 | 1 | 8 | |
8 | ||||
- | 8 | 7 | ||
Subtract the numbers in the ones column from the top number:
18-8-7=3
Place value | thousands | hundreds | tens | ones |
0 | 18 | |||
3 | 7 | 1 | 8 | |
8 | ||||
- | 8 | 7 | ||
3 |
Because the upper digit (0) 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 (10).
Place value | thousands | hundreds | tens | ones |
6 | 10 | |||
0 | 18 | |||
3 | 7 | 1 | 8 | |
8 | ||||
- | 8 | 7 | ||
3 |
Subtract the numbers in the tens column from the top number:
10-8=2
Place value | thousands | hundreds | tens | ones |
6 | 10 | |||
0 | 18 | |||
3 | 7 | 1 | 8 | |
8 | ||||
- | 8 | 7 | ||
2 | 3 |
Write 6 in the hundreds place.
Place value | thousands | hundreds | tens | ones |
6 | 10 | |||
0 | 18 | |||
3 | 7 | 1 | 8 | |
8 | ||||
- | 8 | 7 | ||
6 | 2 | 3 |
Write 3 in the thousands place.
Place value | thousands | hundreds | tens | ones |
6 | 10 | |||
0 | 18 | |||
3 | 7 | 1 | 8 | |
8 | ||||
- | 8 | 7 | ||
3 | 6 | 2 | 3 |
The solution is: 3,623
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