Solution - Long subtraction
49.018
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 5 | 0 | . | 0 | 3 | 8 | |
| - | 1 | . | 0 | 2 | ||
| . |
Put zeros in the blank number places:
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 5 | 0 | . | 0 | 3 | 8 | |
| - | 1 | . | 0 | 2 | 0 | |
| . |
2. Subtract the numbers using long subtraction method
Subtract the numbers in the thousandths column from the top number:
8-0=8
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 5 | 0 | . | 0 | 3 | 8 | |
| - | 1 | . | 0 | 2 | 0 | |
| . | 8 |
Subtract the numbers in the hundredths column from the top number:
3-2=1
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 5 | 0 | . | 0 | 3 | 8 | |
| - | 1 | . | 0 | 2 | 0 | |
| . | 1 | 8 |
Subtract the numbers in the tenths column from the top number:
0-0=0
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 5 | 0 | . | 0 | 3 | 8 | |
| - | 1 | . | 0 | 2 | 0 | |
| . | 0 | 1 | 8 |
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 | tens | ones | . | tenths | hundredths | thousandths |
| 4 | 10 | |||||
| 5 | 0 | . | 0 | 3 | 8 | |
| - | 1 | . | 0 | 2 | 0 | |
| . | 0 | 1 | 8 |
Subtract the numbers in the ones column from the top number:
10-1=9
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 4 | 10 | |||||
| 5 | 0 | . | 0 | 3 | 8 | |
| - | 1 | . | 0 | 2 | 0 | |
| 9 | . | 0 | 1 | 8 |
Write 4 in the tens place.
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 4 | 10 | |||||
| 5 | 0 | . | 0 | 3 | 8 | |
| - | 1 | . | 0 | 2 | 0 | |
| 4 | 9 | . | 0 | 1 | 8 |
The solution is: 49.018
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