Soluzione - Long subtraction
652,8
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | hundreds | tens | ones | . | tenths |
| 7 | 9 | 0 | , | 2 | |
| - | 1 | 3 | 7 | , | 4 |
| , |
2. Subtract the numbers using long subtraction method
Because the upper digit (2) 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 (12).
| Place value | hundreds | tens | ones | . | tenths |
| 8 | 12 | ||||
| 7 | 9 | 0 | , | 2 | |
| - | 1 | 3 | 7 | , | 4 |
| , |
Subtract the numbers in the tenths column from the top number:
12-4=8
| Place value | hundreds | tens | ones | . | tenths |
| 8 | 12 | ||||
| 7 | 9 | 0 | , | 2 | |
| - | 1 | 3 | 7 | , | 4 |
| , | 8 |
Subtract the numbers in the ones column from the top number:
9-7=2
| Place value | hundreds | tens | ones | . | tenths |
| 8 | 12 | ||||
| 7 | 9 | 0 | , | 2 | |
| - | 1 | 3 | 7 | , | 4 |
| 2 | , | 8 |
Subtract the numbers in the tens column from the top number:
8-3=5
| Place value | hundreds | tens | ones | . | tenths |
| 8 | 12 | ||||
| 7 | 9 | 0 | , | 2 | |
| - | 1 | 3 | 7 | , | 4 |
| 5 | 2 | , | 8 |
Subtract the numbers in the hundreds column from the top number:
7-1=6
| Place value | hundreds | tens | ones | . | tenths |
| 8 | 12 | ||||
| 7 | 9 | 0 | , | 2 | |
| - | 1 | 3 | 7 | , | 4 |
| 6 | 5 | 2 | , | 8 |
The solution is: 652,8
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