What is the difference between 68.5 and 0.685 ?

Answer

To find the difference between 68.5 and 0.685, we will follow these steps:

### Step 1: Write the numbers in a subtraction format
We need to subtract 0.685 from 68.5. We can set it up as:
\[ 68.5 - 0.685 \]

### Step 2: Align the decimal points
To make subtraction easier, we align the numbers by their decimal points:
```
68.500
- 0.685
```

### Step 3: Perform the subtraction
Now we will subtract starting from the rightmost digit:
1. In the thousandths place: \(0 - 5\) (we need to borrow)
- Borrow 1 from the hundredths place (which becomes 4), making it \(10 - 5 = 5\).

2. In the hundredths place: \(4 - 8\) (we need to borrow again)
- Borrow 1 from the tenths place (which becomes 7), making it \(14 - 8 = 6\).

3. In the tenths place: \(7 - 6 = 1\).

4. In the units place: \(8 - 0 = 8\).

5. In the tens place: \(6 - 0 = 6\).

Putting it all together, we find:
```
68.500
- 0.685
----------
67.815
```

### Final Answer
The difference between 68.5 and 0.685 is **67.815**.

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