Minus (-) odds represent the number you have to bet to winR$100 ($360 bet on -360 =R$100 winnings). These numbers can be extrapolated up or down based on what you are actually betting. AR$10 bet on +360 odds means aR$36 gain, while aR$36 bet on -360 odds garners aR$10 win, and so on and so forth.
The + and - are put in front of odds or lines, indicating the favorites and underdogs. The favorites will be marked with a minus sign, whereas underdogs have the plus sign. This is the case for all types of bets, including moneylines and point spreads.