Add the following 6.606, 66.6, 666, 0.066, 0.66

Answer

To solve the problem of adding the numbers 6.606, 66.6, 666, 0.066, and 0.66, we will follow these steps:

### Step-by-Step Solution:

1. **Write the Numbers in Vertical Order**:
We will align the numbers by their decimal points to make the addition easier. Here’s how it looks:

```
6.606
66.600
666.000
0.066
0.660
```

2. **Fill in Zeros for Alignment**:
To ensure all numbers have the same number of decimal places, we can add zeros where necessary. This helps in aligning the digits properly.

```
6.606
66.600
666.000
0.066
0.660
```

3. **Add the Numbers Column by Column**:
Start from the rightmost column (the thousandths place) and move to the left:

- **Thousandths Place**: 6 + 0 + 0 + 6 + 0 = 12 (write down 2 and carry over 1)
- **Hundredths Place**: 0 + 0 + 0 + 6 + 6 = 12 + 1 (carry) = 13 (write down 3 and carry over 1)
- **Tenths Place**: 6 + 6 + 0 + 0 + 0 = 12 + 1 (carry) = 13 (write down 3 and carry over 1)
- **Units Place**: 6 + 6 + 6 + 0 + 0 = 18 + 1 (carry) = 19 (write down 9 and carry over 1)
- **Tens Place**: 0 + 6 + 0 + 0 + 0 = 6 + 1 (carry) = 7

So, when we add these up, we get:

```
739.932
```

4. **Final Result**:
The sum of the numbers 6.606, 66.6, 666, 0.066, and 0.66 is **739.932**.

### Final Answer:
**739.932**

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