Solution - Long subtraction
351.86
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 3 | 8 | 0 | . | 1 | 3 | |
| - | 2 | 8 | . | 2 | 7 | |
| . |
2. Subtract the numbers using long subtraction method
Because the upper digit (3) in the hundredths column is too small to get a positive difference, borrow 1 from the digit (1) in the next number place which becomes (0) and get (13).
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 0 | 13 | |||||
| 3 | 8 | 0 | . | 1 | 3 | |
| - | 2 | 8 | . | 2 | 7 | |
| . |
Subtract the numbers in the hundredths column from the top number:
13-7=6
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 0 | 13 | |||||
| 3 | 8 | 0 | . | 1 | 3 | |
| - | 2 | 8 | . | 2 | 7 | |
| . | 6 |
Because the upper digit (0) in the tenths column is too small to get a positive difference, borrow 1 from the number to the left (80) which becomes (79) and get (10).
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 7 | 10 | |||||
| 0 | 13 | |||||
| 3 | 8 | 0 | . | 1 | 3 | |
| - | 2 | 8 | . | 2 | 7 | |
| . | 6 |
Subtract the numbers in the tenths column from the top number:
10-2=8
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 7 | 10 | |||||
| 0 | 13 | |||||
| 3 | 8 | 0 | . | 1 | 3 | |
| - | 2 | 8 | . | 2 | 7 | |
| . | 8 | 6 |
Subtract the numbers in the ones column from the top number:
9-8=1
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 7 | 10 | |||||
| 0 | 13 | |||||
| 3 | 8 | 0 | . | 1 | 3 | |
| - | 2 | 8 | . | 2 | 7 | |
| 1 | . | 8 | 6 |
Subtract the numbers in the tens column from the top number:
7-2=5
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 7 | 10 | |||||
| 0 | 13 | |||||
| 3 | 8 | 0 | . | 1 | 3 | |
| - | 2 | 8 | . | 2 | 7 | |
| 5 | 1 | . | 8 | 6 |
Write 3 in the hundreds place.
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 7 | 10 | |||||
| 0 | 13 | |||||
| 3 | 8 | 0 | . | 1 | 3 | |
| - | 2 | 8 | . | 2 | 7 | |
| 3 | 5 | 1 | . | 8 | 6 |
The solution is: 351.86
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