Soluzione - Long subtraction
653,1
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | hundreds | tens | ones | . | tenths |
| 7 | 5 | 0 | , | 1 | |
| - | 9 | 7 | |||
| , |
Put zeros in the blank number places:
| Place value | hundreds | tens | ones | . | tenths |
| 7 | 5 | 0 | , | 1 | |
| - | 9 | 7 | , | 0 | |
| , |
2. Subtract the numbers using long subtraction method
Subtract the numbers in the tenths column from the top number:
1-0=1
| Place value | hundreds | tens | ones | . | tenths |
| 7 | 5 | 0 | , | 1 | |
| - | 9 | 7 | , | 0 | |
| , | 1 |
Because the upper digit (0) in the ones column is too small to get a positive difference, borrow 1 from the digit (5) in the next number place which becomes (4) and get (10).
| Place value | hundreds | tens | ones | . | tenths |
| 4 | 10 | ||||
| 7 | 5 | 0 | , | 1 | |
| - | 9 | 7 | , | 0 | |
| , | 1 |
Subtract the numbers in the ones column from the top number:
10-7=3
| Place value | hundreds | tens | ones | . | tenths |
| 4 | 10 | ||||
| 7 | 5 | 0 | , | 1 | |
| - | 9 | 7 | , | 0 | |
| 3 | , | 1 |
Because the upper digit (4) in the tens 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 (14).
| Place value | hundreds | tens | ones | . | tenths |
| 6 | 14 | ||||
| 4 | 10 | ||||
| 7 | 5 | 0 | , | 1 | |
| - | 9 | 7 | , | 0 | |
| 3 | , | 1 |
Subtract the numbers in the tens column from the top number:
14-9=5
| Place value | hundreds | tens | ones | . | tenths |
| 6 | 14 | ||||
| 4 | 10 | ||||
| 7 | 5 | 0 | , | 1 | |
| - | 9 | 7 | , | 0 | |
| 5 | 3 | , | 1 |
Write 6 in the hundreds place.
| Place value | hundreds | tens | ones | . | tenths |
| 6 | 14 | ||||
| 4 | 10 | ||||
| 7 | 5 | 0 | , | 1 | |
| - | 9 | 7 | , | 0 | |
| 6 | 5 | 3 | , | 1 |
The solution is: 653,1
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