Soluzione - Long subtraction
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | ten thousands | thousands | hundreds | tens | ones | . | tenths |
| 1 | 8 | 4 | 9 | 0 | |||
| - | 1 | 5 | 9 | 0 | 1 | , | 4 |
| , |
Put zeros in the blank number places:
| Place value | ten thousands | thousands | hundreds | tens | ones | . | tenths |
| 1 | 8 | 4 | 9 | 0 | , | 0 | |
| - | 1 | 5 | 9 | 0 | 1 | , | 4 |
| , |
2. Subtract the numbers using long subtraction method
Because the upper digit (0) in the tenths column is too small to get a positive difference, borrow 1 from the number to the left (90) which becomes (89) and get (10).
| Place value | ten thousands | thousands | hundreds | tens | ones | . | tenths |
| 8 | 10 | ||||||
| 1 | 8 | 4 | 9 | 0 | , | 0 | |
| - | 1 | 5 | 9 | 0 | 1 | , | 4 |
| , |
Subtract the numbers in the tenths column from the top number:
10-0-4=6
| Place value | ten thousands | thousands | hundreds | tens | ones | . | tenths |
| 8 | 10 | ||||||
| 1 | 8 | 4 | 9 | 0 | , | 0 | |
| - | 1 | 5 | 9 | 0 | 1 | , | 4 |
| , | 6 |
Subtract the numbers in the ones column from the top number:
9-1=8
| Place value | ten thousands | thousands | hundreds | tens | ones | . | tenths |
| 8 | 10 | ||||||
| 1 | 8 | 4 | 9 | 0 | , | 0 | |
| - | 1 | 5 | 9 | 0 | 1 | , | 4 |
| 8 | , | 6 |
Subtract the numbers in the tens column from the top number:
8-0=8
| Place value | ten thousands | thousands | hundreds | tens | ones | . | tenths |
| 8 | 10 | ||||||
| 1 | 8 | 4 | 9 | 0 | , | 0 | |
| - | 1 | 5 | 9 | 0 | 1 | , | 4 |
| 8 | 8 | , | 6 |
Because the upper digit (4) in the hundreds 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 (14).
| Place value | ten thousands | thousands | hundreds | tens | ones | . | tenths |
| 7 | 14 | ||||||
| 8 | 10 | ||||||
| 1 | 8 | 4 | 9 | 0 | , | 0 | |
| - | 1 | 5 | 9 | 0 | 1 | , | 4 |
| 8 | 8 | , | 6 |
Subtract the numbers in the hundreds column from the top number:
14-9=5
| Place value | ten thousands | thousands | hundreds | tens | ones | . | tenths |
| 7 | 14 | ||||||
| 8 | 10 | ||||||
| 1 | 8 | 4 | 9 | 0 | , | 0 | |
| - | 1 | 5 | 9 | 0 | 1 | , | 4 |
| 5 | 8 | 8 | , | 6 |
Subtract the numbers in the thousands column from the top number:
7-5=2
| Place value | ten thousands | thousands | hundreds | tens | ones | . | tenths |
| 7 | 14 | ||||||
| 8 | 10 | ||||||
| 1 | 8 | 4 | 9 | 0 | , | 0 | |
| - | 1 | 5 | 9 | 0 | 1 | , | 4 |
| 2 | 5 | 8 | 8 | , | 6 |
Subtract the numbers in the ten thousands column from the top number:
1-1=0
| Place value | ten thousands | thousands | hundreds | tens | ones | . | tenths |
| 7 | 14 | ||||||
| 8 | 10 | ||||||
| 1 | 8 | 4 | 9 | 0 | , | 0 | |
| - | 1 | 5 | 9 | 0 | 1 | , | 4 |
| 0 | 2 | 5 | 8 | 8 | , | 6 |
The solution is: 2588,6
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