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New record!

Training statistics

Points
0
Correct
0
Multiplier
X1
Record
Current session
XP 0
Obrazacoins 0
Current session
XP 0
Obrazacoins 0

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Settings

Pause

Training duration

Time per question

Mistakes

Mistakes made during the training will appear here.

Negative numbers

Training mastery level

About the trainer

Subtraction within 20

Mastered this simulator? Proceed to subtraction training within the limits of 50.

Instructions

Math trainer features

  • Multiple difficulty levels. The system will suggest whether you should switch to an easier or harder trainer.
  • Modes with negative (for addition and subtraction) and fractional numbers
  • Fast answer checking for more effective practice
  • The ability to enter answers using the number keys on the keyboard. Press Space to see the answer
  • Timed training sessions, like athletes use
  • The answer timer motivates you to calculate faster
  • Shows the correct answer if you answered incorrectly or ran out of time

Timed training sessions

The green bar at the bottom shows the remaining training time.

You can noticeably improve your skills by doing 3 training sessions of 5 minutes each day. At the end of each session you will see detailed statistics for your answers. The longer the session, the bigger the bonus to your experience points.

Answer time limit

The blue bar at the top shows the remaining time to answer.

The time limit encourages you to memorize rather than calculate basic examples (multiplication tables, addition, and so on).

For more complex examples, the limit motivates you to calculate faster, but if you do not have time to solve a problem, you can always increase the time for one question or disable this feature entirely.