[header] How to bet on sports [title] Bet on point spreads. [step] Point spreads help to balance out the odds of each team winning. When people bet on point spreads, they usually talk about (+ 3.5), (- 7.5), (+ 4), etc. 
This is how many points are added or subtracted from a team's final score. Take, for example, the chicago bears (+ 5) and the green bay packers (- 5) are playing each other this sunday.