Soluzione - Long subtraction
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 1 | 0 | 6 | 7 | 0 | 5 | 1 | 8 | 1 | |
| - | 9 | 7 | 7 | 7 | 0 | 1 | 4 | ||
2. Subtract the numbers using long subtraction method
Because the upper digit (1) in the ones column is too small to get a positive difference, borrow 1 from the digit (8) in the next number place which becomes (7) and get (11).
| Place value | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 7 | 11 | ||||||||
| 1 | 0 | 6 | 7 | 0 | 5 | 1 | 8 | 1 | |
| - | 9 | 7 | 7 | 7 | 0 | 1 | 4 | ||
Subtract the numbers in the ones column from the top number:
11-4=7
| Place value | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 7 | 11 | ||||||||
| 1 | 0 | 6 | 7 | 0 | 5 | 1 | 8 | 1 | |
| - | 9 | 7 | 7 | 7 | 0 | 1 | 4 | ||
| 7 |
Subtract the numbers in the tens column from the top number:
7-1=6
| Place value | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 7 | 11 | ||||||||
| 1 | 0 | 6 | 7 | 0 | 5 | 1 | 8 | 1 | |
| - | 9 | 7 | 7 | 7 | 0 | 1 | 4 | ||
| 6 | 7 |
Subtract the numbers in the hundreds column from the top number:
1-0=1
| Place value | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 7 | 11 | ||||||||
| 1 | 0 | 6 | 7 | 0 | 5 | 1 | 8 | 1 | |
| - | 9 | 7 | 7 | 7 | 0 | 1 | 4 | ||
| 1 | 6 | 7 |
Because the upper digit (5) in the thousands column is too small to get a positive difference, borrow 1 from the number to the left (70) which becomes (69) and get (15).
| Place value | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 6 | 9 | 15 | |||||||
| 7 | 11 | ||||||||
| 1 | 0 | 6 | 7 | 0 | 5 | 1 | 8 | 1 | |
| - | 9 | 7 | 7 | 7 | 0 | 1 | 4 | ||
| 1 | 6 | 7 |
Subtract the numbers in the thousands column from the top number:
15-7=8
| Place value | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 6 | 9 | 15 | |||||||
| 7 | 11 | ||||||||
| 1 | 0 | 6 | 7 | 0 | 5 | 1 | 8 | 1 | |
| - | 9 | 7 | 7 | 7 | 0 | 1 | 4 | ||
| 8 | 1 | 6 | 7 |
Subtract the numbers in the ten thousands column from the top number:
9-7=2
| Place value | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 6 | 9 | 15 | |||||||
| 7 | 11 | ||||||||
| 1 | 0 | 6 | 7 | 0 | 5 | 1 | 8 | 1 | |
| - | 9 | 7 | 7 | 7 | 0 | 1 | 4 | ||
| 2 | 8 | 1 | 6 | 7 |
Because the upper digit (6) in the hundred thousands 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 (16).
| Place value | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 5 | 16 | ||||||||
| 6 | 9 | 15 | |||||||
| 7 | 11 | ||||||||
| 1 | 0 | 6 | 7 | 0 | 5 | 1 | 8 | 1 | |
| - | 9 | 7 | 7 | 7 | 0 | 1 | 4 | ||
| 2 | 8 | 1 | 6 | 7 |
Subtract the numbers in the hundred thousands column from the top number:
16-7=9
| Place value | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 5 | 16 | ||||||||
| 6 | 9 | 15 | |||||||
| 7 | 11 | ||||||||
| 1 | 0 | 6 | 7 | 0 | 5 | 1 | 8 | 1 | |
| - | 9 | 7 | 7 | 7 | 0 | 1 | 4 | ||
| 9 | 2 | 8 | 1 | 6 | 7 |
Because the upper digit (5) in the millions column is too small to get a positive difference, borrow 1 from the number to the left (10) which becomes (09) and get (15).
| Place value | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 0 | 9 | 15 | |||||||
| 5 | 16 | ||||||||
| 6 | 9 | 15 | |||||||
| 7 | 11 | ||||||||
| 1 | 0 | 6 | 7 | 0 | 5 | 1 | 8 | 1 | |
| - | 9 | 7 | 7 | 7 | 0 | 1 | 4 | ||
| 9 | 2 | 8 | 1 | 6 | 7 |
Subtract the numbers in the millions column from the top number:
15-9=6
| Place value | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 0 | 9 | 15 | |||||||
| 5 | 16 | ||||||||
| 6 | 9 | 15 | |||||||
| 7 | 11 | ||||||||
| 1 | 0 | 6 | 7 | 0 | 5 | 1 | 8 | 1 | |
| - | 9 | 7 | 7 | 7 | 0 | 1 | 4 | ||
| 6 | 9 | 2 | 8 | 1 | 6 | 7 |
Write 9 in the ten millions place.
| Place value | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 0 | 9 | 15 | |||||||
| 5 | 16 | ||||||||
| 6 | 9 | 15 | |||||||
| 7 | 11 | ||||||||
| 1 | 0 | 6 | 7 | 0 | 5 | 1 | 8 | 1 | |
| - | 9 | 7 | 7 | 7 | 0 | 1 | 4 | ||
| 9 | 6 | 9 | 2 | 8 | 1 | 6 | 7 |
Write 0 in the hundred millions place.
| Place value | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 0 | 9 | 15 | |||||||
| 5 | 16 | ||||||||
| 6 | 9 | 15 | |||||||
| 7 | 11 | ||||||||
| 1 | 0 | 6 | 7 | 0 | 5 | 1 | 8 | 1 | |
| - | 9 | 7 | 7 | 7 | 0 | 1 | 4 | ||
| 0 | 9 | 6 | 9 | 2 | 8 | 1 | 6 | 7 |
The solution is: 96,928,167
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