`6.2xx5.5xx4.5=?`

Options

A. 154.35
B. 145.54
C. 155.54
D. None of these

Explanation

To solve the problem \( 6.2 \times 5.5 \times 4.5 \), we can break it down into steps.

### Step 1: Multiply the first two numbers
First, we will multiply \( 6.2 \) and \( 5.5 \).

\[ 6.2 \times 5.5 \]

To perform this multiplication, we can break it down:

\[ 6.2 \times 5.5 = 6.2 \times (5 + 0.5) = 6.2 \times 5 + 6.2 \times 0.5 \]

Calculating each part:

- \( 6.2 \times 5 = 31.0 \)
- \( 6.2 \times 0.5 = 3.1 \)

Now, add these two results together:

\[ 31.0 + 3.1 = 34.1 \]

### Step 2: Multiply the result by the third number
Now, we will take the result from Step 1 and multiply it by \( 4.5 \).

\[ 34.1 \times 4.5 \]

Again, we can break this down:

\[ 34.1 \times 4.5 = 34.1 \times (4 + 0.5) = 34.1 \times 4 + 34.1 \times 0.5 \]

Calculating each part:

- \( 34.1 \times 4 = 136.4 \)
- \( 34.1 \times 0.5 = 17.05 \)

Now, add these two results together:

\[ 136.4 + 17.05 = 153.45 \]

### Final Answer
Thus, the value of \( 6.2 \times 5.5 \times 4.5 \) is

\[ \boxed{153.45} \]