12 App

There is an App called 12.  It has students find three digits that are side by side on the screen and have the sum of 12.  The choices come from the digits 2,3,4,5,6.  Before having my students play this game, they were to think of all of the combinations of 3 of the above digits that have a sum of 12.                                        For example: 2 + 4 + 6 = 12; 5 + 5 + 2 = 12... Then the students could play the game.  The game is challenging because it is difficult to find the combinations in the time given.  It is a good game for practicing adding 3 digits and for being very careful observers.