`283.56+142.04+661.78=?`

Options

A. 1084.28
B. 1087.28
C. 1080.38
D. None of these

Explanation

To solve the problem \( 283.56 + 142.04 + 661.78 \), we will follow these steps:

### Step 1: Add the first two numbers
We start by adding \( 283.56 \) and \( 142.04 \).

\[ 283.56 + 142.04 = 425.60 \]

### Step 2: Add the result to the third number
Now, we take the result from Step 1, which is \( 425.60 \), and add \( 661.78 \) to it.

\[ 425.60 + 661.78 = 1087.38 \]

### Final Answer
Thus, the final answer is:

\[ 283.56 + 142.04 + 661.78 = 1087.38 \]

---