Add: 27.8, 46,175.09 and 685.7

Options

A. 934.59
B. 9345.9
C. 934.590
D. 934.89

Answer

To solve the problem of adding the numbers 27.8, 46, 175.09, and 685.7, we will follow these steps:

### Step 1: Align the Numbers
We need to write all the numbers in a column format, ensuring that the decimal points are aligned. We can add zeros to make sure all numbers have the same number of decimal places.

```
27.80
46.00
175.09
685.70
```

### Step 2: Add the Numbers Column by Column
We will start adding from the rightmost column (the decimal part) and move to the left.

1. **Decimal Column:**
- 0 + 0 + 9 + 0 = 9

2. **Tenths Column:**
- 0 + 0 + 0 + 7 = 7

3. **Units Column:**
- 8 + 6 + 5 + 5 = 24 (Write down 4 and carry over 2)

4. **Tens Column:**
- 2 (carry) + 7 + 4 + 1 = 14 (Write down 4 and carry over 1)

5. **Hundreds Column:**
- 1 (carry) + 1 + 0 + 6 = 8

6. **Thousands Column:**
- There is no carry here, so it remains 0.

### Step 3: Write the Final Answer
Putting it all together, we get:

```
27.80
46.00
175.09
685.70
________
934.59
```

Thus, the sum of 27.8, 46, 175.09, and 685.7 is **934.59**.

### Final Answer
The answer is **934.59**.

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