Subtraction电脑版

Subtraction is an Educational game for all ages to polish their Subtraction Math skills.- Each section has four difficulty level Easy, Medium, Hard and, Genius- Each Difficulty level has 20 questions worth of 5 points each- End of each 20 questions the score card displays the current score, previous score and the Highest score 更新内容： 提升体验，修复部分问题。