think you smart ? How to play: 30 seconds - start time. +3 seconds - for every right answer! -3 seco
看更多 »think you smart ? How to play: 30 seconds - start time. +3 seconds - for every right answer! -3 seco
看更多 »You have three seconds to complete every math operations. So, you must be in rush!Challenge yourself
看更多 »A fun way to practice basic math facts for addition, subtraction, multiplication, and division. Race
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