Soluzione - Long subtraction
89
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | thousands | hundreds | tens | ones |
| 1 | 0 | 3 | 6 | |
| - | 9 | 4 | 7 | |
2. Subtract the numbers using long subtraction method
Because the upper digit (6) in the ones 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 (16).
| Place value | thousands | hundreds | tens | ones |
| 2 | 16 | |||
| 1 | 0 | 3 | 6 | |
| - | 9 | 4 | 7 | |
Subtract the numbers in the ones column from the top number:
16-7=9
| Place value | thousands | hundreds | tens | ones |
| 2 | 16 | |||
| 1 | 0 | 3 | 6 | |
| - | 9 | 4 | 7 | |
| 9 |
Because the upper digit (2) in the tens column is too small to get a positive difference, borrow 1 from the number to the left (10) which becomes (09) and get (12).
| Place value | thousands | hundreds | tens | ones |
| 0 | 9 | 12 | ||
| 2 | 16 | |||
| 1 | 0 | 3 | 6 | |
| - | 9 | 4 | 7 | |
| 9 |
Subtract the numbers in the tens column from the top number:
12-4=8
| Place value | thousands | hundreds | tens | ones |
| 0 | 9 | 12 | ||
| 2 | 16 | |||
| 1 | 0 | 3 | 6 | |
| - | 9 | 4 | 7 | |
| 8 | 9 |
Subtract the numbers in the hundreds column from the top number:
9-9=0
| Place value | thousands | hundreds | tens | ones |
| 0 | 9 | 12 | ||
| 2 | 16 | |||
| 1 | 0 | 3 | 6 | |
| - | 9 | 4 | 7 | |
| 0 | 8 | 9 |
Write 0 in the thousands place.
| Place value | thousands | hundreds | tens | ones |
| 0 | 9 | 12 | ||
| 2 | 16 | |||
| 1 | 0 | 3 | 6 | |
| - | 9 | 4 | 7 | |
| 0 | 0 | 8 | 9 |
The solution is: 89
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