Soluzione - Long subtraction
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 9 | 3 | 7 | 4 | 6 | 5 | |
| - | 3 | 9 | 4 | 8 | 6 | |
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 digit (6) in the next number place which becomes (5) and get (15).
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 5 | 15 | |||||
| 9 | 3 | 7 | 4 | 6 | 5 | |
| - | 3 | 9 | 4 | 8 | 6 | |
Subtract the numbers in the ones column from the top number:
15-6=9
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 5 | 15 | |||||
| 9 | 3 | 7 | 4 | 6 | 5 | |
| - | 3 | 9 | 4 | 8 | 6 | |
| 9 |
Because the upper digit (5) in the tens column is too small to get a positive difference, borrow 1 from the digit (4) in the next number place which becomes (3) and get (15).
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 3 | 15 | |||||
| 5 | 15 | |||||
| 9 | 3 | 7 | 4 | 6 | 5 | |
| - | 3 | 9 | 4 | 8 | 6 | |
| 9 |
Subtract the numbers in the tens column from the top number:
15-8=7
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 3 | 15 | |||||
| 5 | 15 | |||||
| 9 | 3 | 7 | 4 | 6 | 5 | |
| - | 3 | 9 | 4 | 8 | 6 | |
| 7 | 9 |
Because the upper digit (3) in the hundreds 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 (13).
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 6 | 13 | |||||
| 3 | 15 | |||||
| 5 | 15 | |||||
| 9 | 3 | 7 | 4 | 6 | 5 | |
| - | 3 | 9 | 4 | 8 | 6 | |
| 7 | 9 |
Subtract the numbers in the hundreds column from the top number:
13-4=9
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 6 | 13 | |||||
| 3 | 15 | |||||
| 5 | 15 | |||||
| 9 | 3 | 7 | 4 | 6 | 5 | |
| - | 3 | 9 | 4 | 8 | 6 | |
| 9 | 7 | 9 |
Because the upper digit (6) in the thousands 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 | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 2 | 16 | |||||
| 6 | 13 | |||||
| 3 | 15 | |||||
| 5 | 15 | |||||
| 9 | 3 | 7 | 4 | 6 | 5 | |
| - | 3 | 9 | 4 | 8 | 6 | |
| 9 | 7 | 9 |
Subtract the numbers in the thousands column from the top number:
16-9=7
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 2 | 16 | |||||
| 6 | 13 | |||||
| 3 | 15 | |||||
| 5 | 15 | |||||
| 9 | 3 | 7 | 4 | 6 | 5 | |
| - | 3 | 9 | 4 | 8 | 6 | |
| 7 | 9 | 7 | 9 |
Because the upper digit (2) in the ten thousands column is too small to get a positive difference, borrow 1 from the digit (9) in the next number place which becomes (8) and get (12).
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 8 | 12 | |||||
| 2 | 16 | |||||
| 6 | 13 | |||||
| 3 | 15 | |||||
| 5 | 15 | |||||
| 9 | 3 | 7 | 4 | 6 | 5 | |
| - | 3 | 9 | 4 | 8 | 6 | |
| 7 | 9 | 7 | 9 |
Subtract the numbers in the ten thousands column from the top number:
12-3=9
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 8 | 12 | |||||
| 2 | 16 | |||||
| 6 | 13 | |||||
| 3 | 15 | |||||
| 5 | 15 | |||||
| 9 | 3 | 7 | 4 | 6 | 5 | |
| - | 3 | 9 | 4 | 8 | 6 | |
| 9 | 7 | 9 | 7 | 9 |
Write 8 in the hundred thousands place.
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 8 | 12 | |||||
| 2 | 16 | |||||
| 6 | 13 | |||||
| 3 | 15 | |||||
| 5 | 15 | |||||
| 9 | 3 | 7 | 4 | 6 | 5 | |
| - | 3 | 9 | 4 | 8 | 6 | |
| 8 | 9 | 7 | 9 | 7 | 9 |
The solution is: 897,979
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