Solution - Long subtraction
8.91
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | tens | ones | . | tenths | hundredths |
| 1 | 0 | . | 0 | 1 | |
| - | 1 | . | 1 | ||
| . |
Put zeros in the blank number places:
| Place value | tens | ones | . | tenths | hundredths |
| 1 | 0 | . | 0 | 1 | |
| - | 1 | . | 1 | 0 | |
| . |
2. Subtract the numbers using long subtraction method
Subtract the numbers in the hundredths column from the top number:
1-0=1
| Place value | tens | ones | . | tenths | hundredths |
| 1 | 0 | . | 0 | 1 | |
| - | 1 | . | 1 | 0 | |
| . | 1 |
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 (10) which becomes (09) and get (10).
| Place value | tens | ones | . | tenths | hundredths |
| 0 | 10 | ||||
| 1 | 0 | . | 0 | 1 | |
| - | 1 | . | 1 | 0 | |
| . | 1 |
Subtract the numbers in the tenths column from the top number:
10-1=9
| Place value | tens | ones | . | tenths | hundredths |
| 0 | 10 | ||||
| 1 | 0 | . | 0 | 1 | |
| - | 1 | . | 1 | 0 | |
| . | 9 | 1 |
Subtract the numbers in the ones column from the top number:
9-1=8
| Place value | tens | ones | . | tenths | hundredths |
| 0 | 10 | ||||
| 1 | 0 | . | 0 | 1 | |
| - | 1 | . | 1 | 0 | |
| 8 | . | 9 | 1 |
Write 0 in the tens place.
| Place value | tens | ones | . | tenths | hundredths |
| 0 | 10 | ||||
| 1 | 0 | . | 0 | 1 | |
| - | 1 | . | 1 | 0 | |
| 0 | 8 | . | 9 | 1 |
The solution is: 8.91
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