1st grade subtraction slot machine game - Interactive slot machine math game on subtraction for kids. Here students will review subtraction by solving a number of problems in the form of a subtraction quick facts game quiz. There are also more subtraction activities under our cards and quiz section. The concept of subtraction was seen earlier and can go from basic subtraction without carrying to subtraction that entails carrying forward numbers. This game will enable students to review their subtraction facts in a fun way. In case of difficulties, kids can resort to counting aids to facilitate the counting process. This game applies to kids in 1st, 2nd and 3rd grades and can be used as a tool for reviewing both and home and in the classroom.