3rd grade addition 3 to 1 digit numbers millionaire game - This is a simple addition game in which students add a single digit number to a three digit number. This exercise is much easier than the previous ones that contain two large numbers. On the game side, this is an interactive millionaire game in which students earn money as they answer questions correctly. Reviewing math activities with fun makes students learn easily and increases their interest towards this �boring� subject. The game can be played by 2nd, 3rd and 4th graders. Given that it is online it can be integrated into any learning management system. Have fun reviewing addition of three digit numbers and also get more free resources on the topic under the quizzes and worksheets section.