a)

Let’s break it down! Adding a positive number to a negative number is like climbing up a hill (positive) and then rolling down another (negative). Here, you start at +3 and then go down 5 steps. So, you end up at -2. It’s a fun little calculation that shows how opposites interact!

Now, for a handy tip: when you’re faced with situations where you add positive and negative numbers, line them up on a number line! It really clarifies the moves you’re making—upward for positive and downward for negative—and helps you visualize the final result. Plus, it’s a neat way to avoid common mistakes like accidentally switching signs!