2nd grade subtraction mental test Coffee quiz game - Mental math requires that children have a good understanding of the math concept under consideration. In the current case students have to mentally solve subtraction problems, choose the correct answer and submit within a given time. At the end of the game, only those who master their subtraction facts will score the highest. Keep practicing until you obtain a high score. If you don�t prefer to review with the online version of the quiz, there is a printable version under the worksheets section of the website. Simply click and select any worksheet that satisfies your current study needs. This math quiz is meant for 1st, 2nd, 3rd and 4th graders who are currently studying the topic of subtraction.