Soluzione - Long subtraction
34,45
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | tens | ones | . | tenths | hundredths |
| 5 | 3 | ||||
| - | 1 | 8 | , | 5 | 5 |
| , |
Put zeros in the blank number places:
| Place value | tens | ones | . | tenths | hundredths |
| 5 | 3 | , | 0 | 0 | |
| - | 1 | 8 | , | 5 | 5 |
| , |
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 (3.0) which becomes (2.9) and get (10).
| Place value | tens | ones | . | tenths | hundredths |
| 2 | 9 | 10 | |||
| 5 | 3 | , | 0 | 0 | |
| - | 1 | 8 | , | 5 | 5 |
| , |
Subtract the numbers in the hundredths column from the top number:
10-0-5=5
| Place value | tens | ones | . | tenths | hundredths |
| 2 | 9 | 10 | |||
| 5 | 3 | , | 0 | 0 | |
| - | 1 | 8 | , | 5 | 5 |
| , | 5 |
Subtract the numbers in the tenths column from the top number:
9-5=4
| Place value | tens | ones | . | tenths | hundredths |
| 2 | 9 | 10 | |||
| 5 | 3 | , | 0 | 0 | |
| - | 1 | 8 | , | 5 | 5 |
| , | 4 | 5 |
Because the upper digit (2) 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 (12).
| Place value | tens | ones | . | tenths | hundredths |
| 4 | 12 | ||||
| 2 | 9 | 10 | |||
| 5 | 3 | , | 0 | 0 | |
| - | 1 | 8 | , | 5 | 5 |
| , | 4 | 5 |
Subtract the numbers in the ones column from the top number:
12-8=4
| Place value | tens | ones | . | tenths | hundredths |
| 4 | 12 | ||||
| 2 | 9 | 10 | |||
| 5 | 3 | , | 0 | 0 | |
| - | 1 | 8 | , | 5 | 5 |
| 4 | , | 4 | 5 |
Subtract the numbers in the tens column from the top number:
4-1=3
| Place value | tens | ones | . | tenths | hundredths |
| 4 | 12 | ||||
| 2 | 9 | 10 | |||
| 5 | 3 | , | 0 | 0 | |
| - | 1 | 8 | , | 5 | 5 |
| 3 | 4 | , | 4 | 5 |
The solution is: 34,45
Come ci siamo comportati?
Lasciaci un feedbackPerché imparare questo
Why learn this