Measurement Quiz Reflection

I took the quiz and it was rather fast the quiz was short only 25 questions. I thought I did a good job it seemed very simple and straightforward I thought it was the easiest test of this year... Then I got my grade back and realized I had no idea what I was doing. The most confusing part for me was when a question had multiple operations such as multiplication then division and maybe a little addition or subtraction too. That confuses me very very much.