Addition Problem: Adding 5 Units to 55

To solve this problem, we'll follow these steps:

• Step 1: Identify the given numbers: 55 (the base number) and 5 (the increment).
• Step 2: Perform the addition by adding the increment to the base number.
• Step 3: Verify the result and finalize the answer.

Let's work through each step:

Step 1: The problem gives us two numbers: 55 and 5.

Step 2: We will add these two numbers together. This means we calculate:
$55 + 5 = 60$.

Step 3: Having performed the addition, we find that the resulting sum is 60.

Therefore, the solution to the problem is $60$, which corresponds to choice 3.