3rd grade subtraction 4 from 4 digit numbers millionaire game - This is an interactive online subtraction game involving large numbers containing up to 4 digits. Subtraction of four digit numbers relies on the same basic principles of subtraction learned in the earlier grades. In this game, students will be subtracting numbers such as the following: 4,567 � 2,345 =. There is clear indication that students will be subtracting numbers that contain digits in the thousands place. In some of the problems in the current game, there is subtraction that requires regrouping or borrowing numbers from neighboring digits. This is a millionaire math game in which students will win points and money if they answer a question correctly. This educational game is for students in 3rd, 4th and 5th grades.