This activity aims to extend understandings of addition and subtraction to add and subtract integers; represent addition and subtraction on a horizontal number line diagram.The game can be played by two students .The game is for two players or two groups, A and B.Here the rules;1. The counter(red small triangle) is put on the space below 0.2. The players take turn two throw two dice.3. The total score for a throw is left number minus right number on the dice. If the total score is positive, mo