Soluzione - Long subtraction
28,31
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | tens | ones | . | tenths | hundredths |
| 9 | 4 | ||||
| - | 6 | 5 | , | 6 | 9 |
| , |
Put zeros in the blank number places:
| Place value | tens | ones | . | tenths | hundredths |
| 9 | 4 | , | 0 | 0 | |
| - | 6 | 5 | , | 6 | 9 |
| , |
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 | |||
| 9 | 4 | , | 0 | 0 | |
| - | 6 | 5 | , | 6 | 9 |
| , |
Subtract the numbers in the hundredths column from the top number:
10-0-9=1
| Place value | tens | ones | . | tenths | hundredths |
| 3 | 9 | 10 | |||
| 9 | 4 | , | 0 | 0 | |
| - | 6 | 5 | , | 6 | 9 |
| , | 1 |
Subtract the numbers in the tenths column from the top number:
9-6=3
| Place value | tens | ones | . | tenths | hundredths |
| 3 | 9 | 10 | |||
| 9 | 4 | , | 0 | 0 | |
| - | 6 | 5 | , | 6 | 9 |
| , | 3 | 1 |
Because the upper digit (3) in the ones column is too small to get a positive difference, borrow 1 from the digit (9) in the next number place which becomes (8) and get (13).
| Place value | tens | ones | . | tenths | hundredths |
| 8 | 13 | ||||
| 3 | 9 | 10 | |||
| 9 | 4 | , | 0 | 0 | |
| - | 6 | 5 | , | 6 | 9 |
| , | 3 | 1 |
Subtract the numbers in the ones column from the top number:
13-5=8
| Place value | tens | ones | . | tenths | hundredths |
| 8 | 13 | ||||
| 3 | 9 | 10 | |||
| 9 | 4 | , | 0 | 0 | |
| - | 6 | 5 | , | 6 | 9 |
| 8 | , | 3 | 1 |
Subtract the numbers in the tens column from the top number:
8-6=2
| Place value | tens | ones | . | tenths | hundredths |
| 8 | 13 | ||||
| 3 | 9 | 10 | |||
| 9 | 4 | , | 0 | 0 | |
| - | 6 | 5 | , | 6 | 9 |
| 2 | 8 | , | 3 | 1 |
The solution is: 28,31
Come ci siamo comportati?
Lasciaci un feedbackPerché imparare questo
Why learn this