Subtract Three Digit Numbers - Pirate Gamer Online For first, second, third, 4th grade math revision | Pirage Game | Math games online for children. Learn how to subtract with or without carrying. This game contains numbers that have three digits e.g. 567 - 234 = ? Students will learn how to subtract large numbers while playing a pirate game online. This game is free and students will learn a lot during the process of playing.