Soluzione - Long subtraction
Spiegazione passo passo
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 |
| 2 | 5 | 6 | 4 | 2 | 1 | 6 | 3 | |
| - | 6 | 4 | 6 | |||||
2. Subtract the numbers using long subtraction method
Because the upper digit (3) 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 (13).
| Place value | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 5 | 13 | |||||||
| 2 | 5 | 6 | 4 | 2 | 1 | 6 | 3 | |
| - | 6 | 4 | 6 | |||||
Subtract the numbers in the ones column from the top number:
13-6=7
| Place value | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 5 | 13 | |||||||
| 2 | 5 | 6 | 4 | 2 | 1 | 6 | 3 | |
| - | 6 | 4 | 6 | |||||
| 7 |
Subtract the numbers in the tens column from the top number:
5-4=1
| Place value | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 5 | 13 | |||||||
| 2 | 5 | 6 | 4 | 2 | 1 | 6 | 3 | |
| - | 6 | 4 | 6 | |||||
| 1 | 7 |
Because the upper digit (1) in the hundreds column is too small to get a positive difference, borrow 1 from the digit (2) in the next number place which becomes (1) and get (11).
| Place value | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 1 | 11 | |||||||
| 5 | 13 | |||||||
| 2 | 5 | 6 | 4 | 2 | 1 | 6 | 3 | |
| - | 6 | 4 | 6 | |||||
| 1 | 7 |
Subtract the numbers in the hundreds column from the top number:
11-6=5
| Place value | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 1 | 11 | |||||||
| 5 | 13 | |||||||
| 2 | 5 | 6 | 4 | 2 | 1 | 6 | 3 | |
| - | 6 | 4 | 6 | |||||
| 5 | 1 | 7 |
Write 1 in the thousands place.
| Place value | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 1 | 11 | |||||||
| 5 | 13 | |||||||
| 2 | 5 | 6 | 4 | 2 | 1 | 6 | 3 | |
| - | 6 | 4 | 6 | |||||
| 1 | 5 | 1 | 7 |
Write 4 in the ten thousands place.
| Place value | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 1 | 11 | |||||||
| 5 | 13 | |||||||
| 2 | 5 | 6 | 4 | 2 | 1 | 6 | 3 | |
| - | 6 | 4 | 6 | |||||
| 4 | 1 | 5 | 1 | 7 |
Write 6 in the hundred thousands place.
| Place value | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 1 | 11 | |||||||
| 5 | 13 | |||||||
| 2 | 5 | 6 | 4 | 2 | 1 | 6 | 3 | |
| - | 6 | 4 | 6 | |||||
| 6 | 4 | 1 | 5 | 1 | 7 |
Write 5 in the millions place.
| Place value | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 1 | 11 | |||||||
| 5 | 13 | |||||||
| 2 | 5 | 6 | 4 | 2 | 1 | 6 | 3 | |
| - | 6 | 4 | 6 | |||||
| 5 | 6 | 4 | 1 | 5 | 1 | 7 |
Write 2 in the ten millions place.
| Place value | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 1 | 11 | |||||||
| 5 | 13 | |||||||
| 2 | 5 | 6 | 4 | 2 | 1 | 6 | 3 | |
| - | 6 | 4 | 6 | |||||
| 2 | 5 | 6 | 4 | 1 | 5 | 1 | 7 |
The solution is: 25,641,517
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