Solution - Long subtraction
32.64
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | tens | ones | . | tenths | hundredths |
| 4 | 0 | . | 4 | 4 | |
| - | 7 | . | 8 | ||
| . |
Put zeros in the blank number places:
| Place value | tens | ones | . | tenths | hundredths |
| 4 | 0 | . | 4 | 4 | |
| - | 7 | . | 8 | 0 | |
| . |
2. Subtract the numbers using long subtraction method
Subtract the numbers in the hundredths column from the top number:
4-0=4
| Place value | tens | ones | . | tenths | hundredths |
| 4 | 0 | . | 4 | 4 | |
| - | 7 | . | 8 | 0 | |
| . | 4 |
Because the upper digit (4) in the tenths column is too small to get a positive difference, borrow 1 from the number to the left (40) which becomes (39) and get (14).
| Place value | tens | ones | . | tenths | hundredths |
| 3 | 14 | ||||
| 4 | 0 | . | 4 | 4 | |
| - | 7 | . | 8 | 0 | |
| . | 4 |
Subtract the numbers in the tenths column from the top number:
14-8=6
| Place value | tens | ones | . | tenths | hundredths |
| 3 | 14 | ||||
| 4 | 0 | . | 4 | 4 | |
| - | 7 | . | 8 | 0 | |
| . | 6 | 4 |
Subtract the numbers in the ones column from the top number:
9-7=2
| Place value | tens | ones | . | tenths | hundredths |
| 3 | 14 | ||||
| 4 | 0 | . | 4 | 4 | |
| - | 7 | . | 8 | 0 | |
| 2 | . | 6 | 4 |
Write 3 in the tens place.
| Place value | tens | ones | . | tenths | hundredths |
| 3 | 14 | ||||
| 4 | 0 | . | 4 | 4 | |
| - | 7 | . | 8 | 0 | |
| 3 | 2 | . | 6 | 4 |
The solution is: 32.64
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