5) \( 9+8-7 \)

Let's break it down step by step for clarity and entertainment! First, we add the numbers: \( 9 + 8 = 17 \). Now, let’s not forget we have to subtract 7 next. So, \( 17 - 7 = 10 \). Voila! The answer is 10, and you can wow your friends with how quickly you solved that! If you want to impress even more, consider practicing similar problems. Start with basic addition and subtraction, then gradually introduce larger numbers or even mental math tricks. The more you play with numbers, the easier it becomes to calculate quickly!