Do you think you are already good in adding numbers? Well, try this game application and you might think twice of your adding skills.
Addition is probably the first Mathematics we've learned. Almost everyday we use addition, but what if every addition you do is time pressured? Will you still be able to do the simple addition as fast as you can?
Choose three numbers that will have a sum of 10 as fast as you can. Don't get time pressured to get higher score.