Solution - Long subtraction
12.33
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | tens | ones | . | tenths | hundredths |
| 8 | 9 | . | 2 | 4 | |
| - | 7 | 6 | . | 9 | 1 |
| . |
2. Subtract the numbers using long subtraction method
Subtract the numbers in the hundredths column from the top number:
4-1=3
| Place value | tens | ones | . | tenths | hundredths |
| 8 | 9 | . | 2 | 4 | |
| - | 7 | 6 | . | 9 | 1 |
| . | 3 |
Because the upper digit (2) in the tenths 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 (12).
| Place value | tens | ones | . | tenths | hundredths |
| 8 | 12 | ||||
| 8 | 9 | . | 2 | 4 | |
| - | 7 | 6 | . | 9 | 1 |
| . | 3 |
Subtract the numbers in the tenths column from the top number:
12-9=3
| Place value | tens | ones | . | tenths | hundredths |
| 8 | 12 | ||||
| 8 | 9 | . | 2 | 4 | |
| - | 7 | 6 | . | 9 | 1 |
| . | 3 | 3 |
Subtract the numbers in the ones column from the top number:
8-6=2
| Place value | tens | ones | . | tenths | hundredths |
| 8 | 12 | ||||
| 8 | 9 | . | 2 | 4 | |
| - | 7 | 6 | . | 9 | 1 |
| 2 | . | 3 | 3 |
Subtract the numbers in the tens column from the top number:
8-7=1
| Place value | tens | ones | . | tenths | hundredths |
| 8 | 12 | ||||
| 8 | 9 | . | 2 | 4 | |
| - | 7 | 6 | . | 9 | 1 |
| 1 | 2 | . | 3 | 3 |
The solution is: 12.33
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