When betting on the best online sportsbooks in the US, you’ll commonly see American odds which are expressed differently than odds in other areas of the world. Here we get into all the details to fully explain the answer to the burning question: how does plus minus work in betting? How Does Plus Minus Work in Sports Betting? When you see a plus or minus upon perusing the betting odds, you may wonder, what does plus and minus mean in betting? Understanding the meaning of plus and minus in betting is crucial to understanding American betting odds properly.