5th grade subtract numbers up to millions Monster board game - Numbers that go up to millions contain up to or over 7 digits. Subtracting big numbers is not different from the subtraction problems seen earlier; however students have to be vigilant not to mix up at any state especially if it entails subtraction and regrouping across different places. Subtraction of millions math exercises will be useful later when students start dealing with word problems, consumer math, simple and compound interest etc. The current video game is an online math monster board game in which students will have fun avoiding monsters on a playing platform. Students win points and also solve subtraction problems. This math fun game is for 4th, 5th and 6th grade.