Subtraction

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 更新內(nèi)容： 提升體驗，修復部分問題。