Solution - Long subtraction
71
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 7 | 8 | . | 8 | 8 | 8 | |
| - | 7 | . | 8 | 8 | 8 | |
| . |
2. Subtract the numbers using long subtraction method
Subtract the numbers in the thousandths column from the top number:
8-8=0
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 7 | 8 | . | 8 | 8 | 8 | |
| - | 7 | . | 8 | 8 | 8 | |
| . | 0 |
Subtract the numbers in the hundredths column from the top number:
8-8=0
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 7 | 8 | . | 8 | 8 | 8 | |
| - | 7 | . | 8 | 8 | 8 | |
| . | 0 | 0 |
Subtract the numbers in the tenths column from the top number:
8-8=0
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 7 | 8 | . | 8 | 8 | 8 | |
| - | 7 | . | 8 | 8 | 8 | |
| . | 0 | 0 | 0 |
Subtract the numbers in the ones column from the top number:
8-7=1
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 7 | 8 | . | 8 | 8 | 8 | |
| - | 7 | . | 8 | 8 | 8 | |
| 1 | . | 0 | 0 | 0 |
Write 7 in the tens place.
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 7 | 8 | . | 8 | 8 | 8 | |
| - | 7 | . | 8 | 8 | 8 | |
| 7 | 1 | . | 0 | 0 | 0 |
The solution is: 71
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