Soluzione - Long subtraction
5,04
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | tens | ones | . | tenths | hundredths |
| 7 | 4 | ||||
| - | 6 | 8 | , | 9 | 6 |
| , |
Put zeros in the blank number places:
| Place value | tens | ones | . | tenths | hundredths |
| 7 | 4 | , | 0 | 0 | |
| - | 6 | 8 | , | 9 | 6 |
| , |
2. Subtract the numbers using long subtraction method
Because the upper digit (0) in the hundredths column is too small to get a positive difference, borrow 1 from the number to the left (4.0) which becomes (3.9) and get (10).
| Place value | tens | ones | . | tenths | hundredths |
| 3 | 9 | 10 | |||
| 7 | 4 | , | 0 | 0 | |
| - | 6 | 8 | , | 9 | 6 |
| , |
Subtract the numbers in the hundredths column from the top number:
10-0-6=4
| Place value | tens | ones | . | tenths | hundredths |
| 3 | 9 | 10 | |||
| 7 | 4 | , | 0 | 0 | |
| - | 6 | 8 | , | 9 | 6 |
| , | 4 |
Subtract the numbers in the tenths column from the top number:
9-9=0
| Place value | tens | ones | . | tenths | hundredths |
| 3 | 9 | 10 | |||
| 7 | 4 | , | 0 | 0 | |
| - | 6 | 8 | , | 9 | 6 |
| , | 0 | 4 |
Because the upper digit (3) in the ones 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 (13).
| Place value | tens | ones | . | tenths | hundredths |
| 6 | 13 | ||||
| 3 | 9 | 10 | |||
| 7 | 4 | , | 0 | 0 | |
| - | 6 | 8 | , | 9 | 6 |
| , | 0 | 4 |
Subtract the numbers in the ones column from the top number:
13-8=5
| Place value | tens | ones | . | tenths | hundredths |
| 6 | 13 | ||||
| 3 | 9 | 10 | |||
| 7 | 4 | , | 0 | 0 | |
| - | 6 | 8 | , | 9 | 6 |
| 5 | , | 0 | 4 |
Subtract the numbers in the tens column from the top number:
6-6=0
| Place value | tens | ones | . | tenths | hundredths |
| 6 | 13 | ||||
| 3 | 9 | 10 | |||
| 7 | 4 | , | 0 | 0 | |
| - | 6 | 8 | , | 9 | 6 |
| 0 | 5 | , | 0 | 4 |
The solution is: 5,04
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