Solution - Long subtraction
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 9 | 2 | . | 5 | 1 | ||
| - | 8 | . | 0 | 3 | 6 | |
| . |
Put zeros in the blank number places:
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 9 | 2 | . | 5 | 1 | 0 | |
| - | 8 | . | 0 | 3 | 6 | |
| . |
2. Subtract the numbers using long subtraction method
Because the upper digit (0) in the thousandths 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 (10).
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 0 | 10 | |||||
| 9 | 2 | . | 5 | 1 | 0 | |
| - | 8 | . | 0 | 3 | 6 | |
| . |
Subtract the numbers in the thousandths column from the top number:
10-0-6=4
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 0 | 10 | |||||
| 9 | 2 | . | 5 | 1 | 0 | |
| - | 8 | . | 0 | 3 | 6 | |
| . | 4 |
Because the upper digit (0) in the hundredths column is too small to get a positive difference, borrow 1 from the digit (5) in the next number place which becomes (4) and get (10).
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 4 | 10 | |||||
| 0 | 10 | |||||
| 9 | 2 | . | 5 | 1 | 0 | |
| - | 8 | . | 0 | 3 | 6 | |
| . | 4 |
Subtract the numbers in the hundredths column from the top number:
10-3=7
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 4 | 10 | |||||
| 0 | 10 | |||||
| 9 | 2 | . | 5 | 1 | 0 | |
| - | 8 | . | 0 | 3 | 6 | |
| . | 7 | 4 |
Subtract the numbers in the tenths column from the top number:
4-0=4
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 4 | 10 | |||||
| 0 | 10 | |||||
| 9 | 2 | . | 5 | 1 | 0 | |
| - | 8 | . | 0 | 3 | 6 | |
| . | 4 | 7 | 4 |
Because the upper digit (2) in the ones column is too small to get a positive difference, borrow 1 from the digit (9) in the next number place which becomes (8) and get (12).
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 8 | 12 | |||||
| 4 | 10 | |||||
| 0 | 10 | |||||
| 9 | 2 | . | 5 | 1 | 0 | |
| - | 8 | . | 0 | 3 | 6 | |
| . | 4 | 7 | 4 |
Subtract the numbers in the ones column from the top number:
12-8=4
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 8 | 12 | |||||
| 4 | 10 | |||||
| 0 | 10 | |||||
| 9 | 2 | . | 5 | 1 | 0 | |
| - | 8 | . | 0 | 3 | 6 | |
| 4 | . | 4 | 7 | 4 |
Write 8 in the tens place.
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 8 | 12 | |||||
| 4 | 10 | |||||
| 0 | 10 | |||||
| 9 | 2 | . | 5 | 1 | 0 | |
| - | 8 | . | 0 | 3 | 6 | |
| 8 | 4 | . | 4 | 7 | 4 |
The solution is: 84.474
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