Type in the answer and hit return. Correct answers are highlighted in green, incorrect answers are highlighted with red.
A new question is asked after the last question is marked.
Use the buttons to change the operation being quizzed.
There is no answer to anything divided by 0, so this is always marked incorrect. I could have filtered those questions out, but it's good to know that dividing by 0 is weird, so I left them in.
Offline caching is enabled, so it should work fine offline-- go to the url Math Exercises on the device and save it to your home screen.
Let me know what you think.