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http://www.oswego.org/ocsd-web/games/SpeedGrid/Subtraction/urikasub2res.html

These are the public entries for this link:

• 6. Speed Grid - choose the nuymbers to give the answer
  By xaviermaths in Number > Year 7 to 10 Sites with system:unfiled
• 2. Speed Grid - number skills try beat the clock
  Speed Grid - play against clock
  By xaviermaths in Number > Computer Lab with applet number

NB: The average rating is calculated using the rating for both public and private entries for this link.