Question

If your playing a game where you have 4 cards and you have to arrange them in to 2 digit numbers so they add up to a number near 100, and then you take the number you got and subtract it from 100, and then you play this game 7 times with 3 other people, and when you add up all of your scores, the person with the lowest sum is the winner, what strategy will you use to win? PLEASE HELP I NEED IT TODAY!