Solution - Long subtraction
7.7
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | tens | ones | . | tenths |
| 1 | 6 | |||
| 2 | . | 6 | ||
| - | 5 | . | 7 | |
| . |
Put zeros in the blank number places:
| Place value | tens | ones | . | tenths |
| 1 | 6 | . | 0 | |
| 2 | . | 6 | ||
| - | 5 | . | 7 | |
| . |
2. Subtract the numbers using long subtraction method
Because the upper digit (0) in the tenths column is too small to get a positive difference, borrow 2 from the digit (6) in the next number place which becomes (4) and get (20).
| Place value | tens | ones | . | tenths |
| 4 | 20 | |||
| 1 | 6 | . | 0 | |
| 2 | . | 6 | ||
| - | 5 | . | 7 | |
| . |
Subtract the numbers in the tenths column from the top number:
20-0-6-7=7
| Place value | tens | ones | . | tenths |
| 4 | 20 | |||
| 1 | 6 | . | 0 | |
| 2 | . | 6 | ||
| - | 5 | . | 7 | |
| . | 7 |
Because the upper digit (4) 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 (14).
| Place value | tens | ones | . | tenths |
| 0 | 14 | |||
| 4 | 20 | |||
| 1 | 6 | . | 0 | |
| 2 | . | 6 | ||
| - | 5 | . | 7 | |
| . | 7 |
Subtract the numbers in the ones column from the top number:
14-2-5=7
| Place value | tens | ones | . | tenths |
| 0 | 14 | |||
| 4 | 20 | |||
| 1 | 6 | . | 0 | |
| 2 | . | 6 | ||
| - | 5 | . | 7 | |
| 7 | . | 7 |
Write 0 in the tens place.
| Place value | tens | ones | . | tenths |
| 0 | 14 | |||
| 4 | 20 | |||
| 1 | 6 | . | 0 | |
| 2 | . | 6 | ||
| - | 5 | . | 7 | |
| 0 | 7 | . | 7 |
The solution is: 7.7
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