Solution - Long subtraction
4.041
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | ones | . | tenths | hundredths | thousandths |
| 5 | . | 0 | 9 | 1 | |
| - | 1 | . | 0 | 5 | |
| . |
Put zeros in the blank number places:
| Place value | ones | . | tenths | hundredths | thousandths |
| 5 | . | 0 | 9 | 1 | |
| - | 1 | . | 0 | 5 | 0 |
| . |
2. Subtract the numbers using long subtraction method
Subtract the numbers in the thousandths column from the top number:
1-0=1
| Place value | ones | . | tenths | hundredths | thousandths |
| 5 | . | 0 | 9 | 1 | |
| - | 1 | . | 0 | 5 | 0 |
| . | 1 |
Subtract the numbers in the hundredths column from the top number:
9-5=4
| Place value | ones | . | tenths | hundredths | thousandths |
| 5 | . | 0 | 9 | 1 | |
| - | 1 | . | 0 | 5 | 0 |
| . | 4 | 1 |
Subtract the numbers in the tenths column from the top number:
0-0=0
| Place value | ones | . | tenths | hundredths | thousandths |
| 5 | . | 0 | 9 | 1 | |
| - | 1 | . | 0 | 5 | 0 |
| . | 0 | 4 | 1 |
Subtract the numbers in the ones column from the top number:
5-1=4
| Place value | ones | . | tenths | hundredths | thousandths |
| 5 | . | 0 | 9 | 1 | |
| - | 1 | . | 0 | 5 | 0 |
| 4 | . | 0 | 4 | 1 |
The solution is: 4.041
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