Solution - Long subtraction
340.4
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | hundreds | tens | ones | . | tenths |
| 4 | 0 | 5 | . | 4 | |
| - | 6 | 5 | |||
| . |
Put zeros in the blank number places:
| Place value | hundreds | tens | ones | . | tenths |
| 4 | 0 | 5 | . | 4 | |
| - | 6 | 5 | . | 0 | |
| . |
2. Subtract the numbers using long subtraction method
Subtract the numbers in the tenths column from the top number:
4-0=4
| Place value | hundreds | tens | ones | . | tenths |
| 4 | 0 | 5 | . | 4 | |
| - | 6 | 5 | . | 0 | |
| . | 4 |
Subtract the numbers in the ones column from the top number:
5-5=0
| Place value | hundreds | tens | ones | . | tenths |
| 4 | 0 | 5 | . | 4 | |
| - | 6 | 5 | . | 0 | |
| 0 | . | 4 |
Because the upper digit (0) in the tens column is too small to get a positive difference, borrow 1 from the digit (4) in the next number place which becomes (3) and get (10).
| Place value | hundreds | tens | ones | . | tenths |
| 3 | 10 | ||||
| 4 | 0 | 5 | . | 4 | |
| - | 6 | 5 | . | 0 | |
| 0 | . | 4 |
Subtract the numbers in the tens column from the top number:
10-6=4
| Place value | hundreds | tens | ones | . | tenths |
| 3 | 10 | ||||
| 4 | 0 | 5 | . | 4 | |
| - | 6 | 5 | . | 0 | |
| 4 | 0 | . | 4 |
Write 3 in the hundreds place.
| Place value | hundreds | tens | ones | . | tenths |
| 3 | 10 | ||||
| 4 | 0 | 5 | . | 4 | |
| - | 6 | 5 | . | 0 | |
| 3 | 4 | 0 | . | 4 |
The solution is: 340.4
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