Soluzione - Long subtraction
162
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | hundreds | tens | ones |
| 4 | 0 | 6 | |
| 1 | 9 | 8 | |
| - | 4 | 6 | |
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 number to the left (40) which becomes (39) and get (16).
| Place value | hundreds | tens | ones |
| 3 | 9 | 16 | |
| 4 | 0 | 6 | |
| 1 | 9 | 8 | |
| - | 4 | 6 | |
Subtract the numbers in the ones column from the top number:
16-8-6=2
| Place value | hundreds | tens | ones |
| 3 | 9 | 16 | |
| 4 | 0 | 6 | |
| 1 | 9 | 8 | |
| - | 4 | 6 | |
| 2 |
Because the upper digit (9) in the tens 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 (19).
| Place value | hundreds | tens | ones |
| 2 | 19 | ||
| 3 | 9 | 16 | |
| 4 | 0 | 6 | |
| 1 | 9 | 8 | |
| - | 4 | 6 | |
| 2 |
Subtract the numbers in the tens column from the top number:
19-9-4=6
| Place value | hundreds | tens | ones |
| 2 | 19 | ||
| 3 | 9 | 16 | |
| 4 | 0 | 6 | |
| 1 | 9 | 8 | |
| - | 4 | 6 | |
| 6 | 2 |
Subtract the numbers in the hundreds column from the top number:
2-1=1
| Place value | hundreds | tens | ones |
| 2 | 19 | ||
| 3 | 9 | 16 | |
| 4 | 0 | 6 | |
| 1 | 9 | 8 | |
| - | 4 | 6 | |
| 1 | 6 | 2 |
The solution is: 162
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