Add the following 9.09, 0.909, 99.9, 9.99, 0.099

Answer

To solve the problem of adding the numbers 9.09, 0.909, 99.9, 9.99, and 0.099, we will follow these steps:

### Step 1: Write the numbers in vertical order
Align the numbers by their decimal points for easier addition.

```
99.90
+ 9.99
+ 9.09
+ 0.909
+ 0.099
```

### Step 2: Add zeros where necessary
To ensure all numbers have the same number of decimal places, we can add zeros to the end of the numbers that have fewer decimal places.

```
99.900
+ 9.990
+ 9.090
+ 0.909
+ 0.099
```

### Step 3: Add the numbers column by column
Now, we will add the numbers starting from the rightmost column (the thousandths place).

```
99.900
+ 9.990
+ 9.090
+ 0.909
+ 0.099
__________
```

- **Thousandths place:** 0 + 0 + 0 + 9 + 9 = 18 (write 8, carry over 1)
- **Hundredths place:** 0 + 9 + 9 + 0 + 9 + 1 (carry) = 28 (write 8, carry over 2)
- **Tenths place:** 9 + 9 + 0 + 0 + 0 + 2 (carry) = 20 (write 0, carry over 2)
- **Units place:** 9 + 0 + 0 + 0 + 0 + 2 (carry) = 11 (write 1, carry over 1)
- **Tens place:** 9 + 1 (carry) = 10 (write 0, carry over 1)
- **Hundreds place:** 1 (carry) = 1

So, the total sum is:

```
119.988
```

### Final Answer
The sum of 9.09, 0.909, 99.9, 9.99, and 0.099 is **119.988**.

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