Find the sum in each of the following `:`
`15 + 0.632 + 13.8`

Answer

To find the sum of the numbers \(15\), \(0.632\), and \(13.8\), we will follow these steps:

### Step 1: Align the numbers
First, we need to write the numbers in a column format, aligning the decimal points. To do this, we can convert the whole number \(15\) into a decimal by adding two zeros after the decimal point, making it \(15.00\). The number \(13.8\) can be converted to \(13.80\) to have two decimal places as well.

So, we write:
```
15.00
+ 0.632
+ 13.80
```

### Step 2: Add the numbers
Now we will add the numbers column by column, starting from the rightmost column (the hundredths place):

1. **Hundredths place**: \(0 + 2 + 0 = 2\)
2. **Tenths place**: \(0 + 3 + 8 = 11\) (write down \(1\) and carry over \(1\))
3. **Units place**: \(5 + 6 + 3 + 1 (carry) = 15\) (write down \(5\) and carry over \(1\))
4. **Tens place**: \(1 + 0 + 1 (carry) = 2\)

Putting it all together, we have:
```
15.00
+ 0.632
+ 13.80
-------
29.432
```

### Final Answer
The sum of \(15 + 0.632 + 13.8\) is \(29.432\).

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