Speed! I think they will win.
When I play Speed! with any of my kids they usually beat me. I'm too busy trying to figure out which card to play next while they shout "Speed" because the two cards in the center are the same. I end up getting all the cards and they win. It's a bummer for me, but they love it. Actually I love it too because they are developing their number sense, while I'm secretly laying the foundation for multiplication.
Games have made math a fun and low stress subject. We focus on the basics. After all, my math education through fifth grade was mainly addition, subtraction, multiplication and division. Telling time, learning about money, rounding and other mathmatical subjects seemed to happen more during the course of life than in school.
After each round the kids beg to play again. Winning the fast paced race keeps them coming back for more.