minus mission is a game that is featured and it is added to the grade one. You will have to add up the values of all the coins and click on to the answer that is correct. In this game of math the faster you are to answer the dolphin will move that faster. only one player will be able to play this game at a particular time. it works on the theme that is creeping slime. there is a robot which is present at the bottom of the screen to which the green slime which is large and present at the top drops the blobs with the problems of subtraction in it.