we site
https://rummybs.com
A fun math game for all ages! Think fast - you're on the clock!
** Global high scores - can you reach the top of the leaderboard? **
Quickly answer whether a math problem is right or wrong!
How7up 7 Down fast can you answer 20, 50, or 100 problems?
Set difficulty level to easy, medium, or hard.
Play any combination addition, subtraction, multiplication, and division.