Solution - Long subtraction
3.24
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | tens | ones | . | tenths | hundredths |
| 1 | 2 | ||||
| - | 8 | . | 7 | 6 | |
| . |
Put zeros in the blank number places:
| Place value | tens | ones | . | tenths | hundredths |
| 1 | 2 | . | 0 | 0 | |
| - | 8 | . | 7 | 6 | |
| . |
2. Subtract the numbers using long subtraction method
Because the upper digit (0) in the hundredths column is too small to get a positive difference, borrow 1 from the number to the left (2.0) which becomes (1.9) and get (10).
| Place value | tens | ones | . | tenths | hundredths |
| 1 | 9 | 10 | |||
| 1 | 2 | . | 0 | 0 | |
| - | 8 | . | 7 | 6 | |
| . |
Subtract the numbers in the hundredths column from the top number:
10-0-6=4
| Place value | tens | ones | . | tenths | hundredths |
| 1 | 9 | 10 | |||
| 1 | 2 | . | 0 | 0 | |
| - | 8 | . | 7 | 6 | |
| . | 4 |
Subtract the numbers in the tenths column from the top number:
9-7=2
| Place value | tens | ones | . | tenths | hundredths |
| 1 | 9 | 10 | |||
| 1 | 2 | . | 0 | 0 | |
| - | 8 | . | 7 | 6 | |
| . | 2 | 4 |
Because the upper digit (1) in the ones 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 (11).
| Place value | tens | ones | . | tenths | hundredths |
| 0 | 11 | ||||
| 1 | 9 | 10 | |||
| 1 | 2 | . | 0 | 0 | |
| - | 8 | . | 7 | 6 | |
| . | 2 | 4 |
Subtract the numbers in the ones column from the top number:
11-8=3
| Place value | tens | ones | . | tenths | hundredths |
| 0 | 11 | ||||
| 1 | 9 | 10 | |||
| 1 | 2 | . | 0 | 0 | |
| - | 8 | . | 7 | 6 | |
| 3 | . | 2 | 4 |
Write 0 in the tens place.
| Place value | tens | ones | . | tenths | hundredths |
| 0 | 11 | ||||
| 1 | 9 | 10 | |||
| 1 | 2 | . | 0 | 0 | |
| - | 8 | . | 7 | 6 | |
| 0 | 3 | . | 2 | 4 |
The solution is: 3.24
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