Solution - Long subtraction
31.51
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | tens | ones | . | tenths | hundredths |
| 3 | 8 | . | 7 | 1 | |
| 4 | |||||
| - | 3 | . | 2 | ||
| . |
Put zeros in the blank number places:
| Place value | tens | ones | . | tenths | hundredths |
| 3 | 8 | . | 7 | 1 | |
| 4 | . | 0 | 0 | ||
| - | 3 | . | 2 | 0 | |
| . |
2. Subtract the numbers using long subtraction method
Subtract the numbers in the hundredths column from the top number:
1-0-0=1
| Place value | tens | ones | . | tenths | hundredths |
| 3 | 8 | . | 7 | 1 | |
| 4 | . | 0 | 0 | ||
| - | 3 | . | 2 | 0 | |
| . | 1 |
Subtract the numbers in the tenths column from the top number:
7-0-2=5
| Place value | tens | ones | . | tenths | hundredths |
| 3 | 8 | . | 7 | 1 | |
| 4 | . | 0 | 0 | ||
| - | 3 | . | 2 | 0 | |
| . | 5 | 1 |
Subtract the numbers in the ones column from the top number:
8-4-3=1
| Place value | tens | ones | . | tenths | hundredths |
| 3 | 8 | . | 7 | 1 | |
| 4 | . | 0 | 0 | ||
| - | 3 | . | 2 | 0 | |
| 1 | . | 5 | 1 |
Write 3 in the tens place.
| Place value | tens | ones | . | tenths | hundredths |
| 3 | 8 | . | 7 | 1 | |
| 4 | . | 0 | 0 | ||
| - | 3 | . | 2 | 0 | |
| 3 | 1 | . | 5 | 1 |
The solution is: 31.51
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