11. \( 13+(-22) \)

Let's break it down! When you add a positive number to a negative number, it's like subtracting the absolute value of the negative number from the positive. So, \( 13 + (-22) \) is the same as \( 13 - 22 \), which equals \( -9 \). Now imagine you’re at a party with 13 friends, but then 22 more show up unexpectedly, and you only have room for 13. It feels like you’re in a bit of a tight spot – you’re not going to have enough space! That’s how the negative number pulls the total down. So, you end up with a fun but cramped situation of \( -9 \) friends over capacity!