Rekenoefeningen

menu, choose the sum that you want to practice.

* 20 + sums of
* 20 - sums
* 20 x sums of
* 20: enumerate

Any amount you give four possible choices.
Clear display with a right or wrong answer.
Sums may be beaten to try again later.
These give a total of 80 sums you to promote your math skills a good exercise.