52.416 +18.72 +6.28 =?

Options

A. 77.416
B. 8.36
C. 9.08
D. `9.80`

Answer

To solve the problem \( 52.416 + 18.72 + 6.28 \), we will follow these steps:

### Step 1: Align the numbers by their decimal points
We need to write the numbers in a column format, aligning them by the decimal point for easier addition.

```
52.416
+ 18.720
+ 6.280
```

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

1. **Thousandths place**:
- \( 6 + 0 + 0 = 6 \)

2. **Hundredths place**:
- \( 1 + 2 + 8 = 11 \)
- Write down 1 and carry over 1.

3. **Tenths place**:
- \( 4 + 7 + 6 + 1 (carry) = 18 \)
- Write down 8 and carry over 1.

4. **Units place**:
- \( 2 + 8 + 0 + 1 (carry) = 11 \)
- Write down 1 and carry over 1.

5. **Tens place**:
- \( 5 + 1 + 0 + 1 (carry) = 7 \)

### Step 3: Combine the results
Now, we combine all the results from our addition:

```
52.416
+ 18.720
+ 6.280
---------
77.416
```

### Final Answer
Thus, the sum \( 52.416 + 18.72 + 6.28 = 77.416 \).