Mark against the correct answer
Among 2.6, 2.006, 2.66 and 2.08, the largest number is

Options

A. 2.006
B. 2.08
C. 2.6
D. 2.66

Answer

To determine the largest number among 2.6, 2.006, 2.66, and 2.08, we will compare these decimal numbers step by step.

### Step 1: Write down the numbers
We have the following numbers to compare:
- 2.6
- 2.006
- 2.66
- 2.08

### Step 2: Align the numbers for comparison
Align the numbers by their decimal points for easier comparison:
```
2.006
2.08
2.6
2.66
```

### Step 3: Compare the whole number part
All numbers have the same whole number part, which is 2. Therefore, we will compare the decimal parts.

### Step 4: Compare the first decimal place
- For 2.006, the first decimal place is 0.
- For 2.08, the first decimal place is 0.
- For 2.6, the first decimal place is 6.
- For 2.66, the first decimal place is 6.

The largest value in the first decimal place is 6, which belongs to 2.6 and 2.66.

### Step 5: Compare the second decimal place for 2.6 and 2.66
- 2.6 has no digit in the second decimal place (consider it as 0).
- 2.66 has 6 in the second decimal place.

Since 6 is greater than 0, we can conclude that 2.66 is greater than 2.6.

### Step 6: Conclusion
Now we can summarize our findings:
- 2.006 is less than 2.08.
- 2.08 is less than 2.6.
- 2.6 is less than 2.66.

Thus, the largest number among the given options is **2.66**.

### Final Answer
The largest number is **2.66**.

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