MathPackPractice
Practice answering math questions quickly. With the settings you can choose which numbers or which facts (5s, 10s, 12s, etc) you would like to be tested on. Check your progress with the leaderboard which will show the top five scores for each operation. For each operation you can have different settings on what you would like to practice. For every answer you get wrong a second will be added to your time and your accuracy will go down.