2nd grade subtraction quick facts Fishing game - A quick warm up activity on subtraction of numbers � It is an interactive online math game with a fishing component. Students will solve a problem correctly and have a chance to hook a fish swimming in a river. The math fishing game is quite fun and students could use it to review their subtraction facts both at home and in the classroom. Begin reviewing some subtraction facts and catching fish. This game is for 1st, 2nd , 3rd and 4th grade children. It can be used while reviewing how to subtract in the classroom by teaching in search of a fun activity to energize their math class or by parents who need extra resources to homeschool their kids. Math has never been so much fun. Click and start learning.