Solve the Addition Problem: 3 + 4.57 Step by Step

To solve this problem, follow these steps:

• Step 1: Recognize the numbers to be added are $3$ and $4.57$.

• Step 2: Write $3$ as $3.00$ for easier alignment by the decimal point.

• Step 3: Align the numbers:
        $\phantom{0}3.00$
  $+4.57$

• Step 4: Add the numbers column by column starting from the rightmost column.

Let's perform the addition:

• Rightmost column (hundredths): $0 + 7 = 7$.

• Next column (tenths): $0 + 5 = 5$.

• Next column (units): $3 + 4 = 7$.

The sum of $3$ and $4.57$ is calculated as follows:

First, verify the alignment of the decimals, then add each column:

$3.00 + 4.57 = 7.57$

The calculated sum is $7.57$.

The correct answer from the given choices is: $7.57$, which matches choice 3.