Solution - Long subtraction
180.63
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 1 | 8 | 5 | . | 6 | ||
| - | 4 | . | 9 | 7 | ||
| . |
Put zeros in the blank number places:
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 1 | 8 | 5 | . | 6 | 0 | |
| - | 4 | . | 9 | 7 | ||
| . |
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 digit (6) in the next number place which becomes (5) and get (10).
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 5 | 10 | |||||
| 1 | 8 | 5 | . | 6 | 0 | |
| - | 4 | . | 9 | 7 | ||
| . |
Subtract the numbers in the hundredths column from the top number:
10-0-7=3
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 5 | 10 | |||||
| 1 | 8 | 5 | . | 6 | 0 | |
| - | 4 | . | 9 | 7 | ||
| . | 3 |
Because the upper digit (5) in the tenths 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 (15).
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 4 | 15 | |||||
| 5 | 10 | |||||
| 1 | 8 | 5 | . | 6 | 0 | |
| - | 4 | . | 9 | 7 | ||
| . | 3 |
Subtract the numbers in the tenths column from the top number:
15-9=6
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 4 | 15 | |||||
| 5 | 10 | |||||
| 1 | 8 | 5 | . | 6 | 0 | |
| - | 4 | . | 9 | 7 | ||
| . | 6 | 3 |
Subtract the numbers in the ones column from the top number:
4-4=0
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 4 | 15 | |||||
| 5 | 10 | |||||
| 1 | 8 | 5 | . | 6 | 0 | |
| - | 4 | . | 9 | 7 | ||
| 0 | . | 6 | 3 |
Write 8 in the tens place.
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 4 | 15 | |||||
| 5 | 10 | |||||
| 1 | 8 | 5 | . | 6 | 0 | |
| - | 4 | . | 9 | 7 | ||
| 8 | 0 | . | 6 | 3 |
Write 1 in the hundreds place.
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 4 | 15 | |||||
| 5 | 10 | |||||
| 1 | 8 | 5 | . | 6 | 0 | |
| - | 4 | . | 9 | 7 | ||
| 1 | 8 | 0 | . | 6 | 3 |
The solution is: 180.63
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