Basic Facts Boxes | Up to 20

I completed a speed demon challenge up to 20.

I did up to 20 because i wanted to challenge myself and go onto a higher level.

I got 2 wrong but they were typing errors. I got 100/100 and my time was 11 minutes and 9 seconds.

Next time i will try a harder level and get a higher time.

LI: to recall basic facts fluently and quickly