Basic Facts Boxes

I completed a basic facts boxes challenge. The basic facts boxes challenge has two levels the speed demon or the brain box challenge. You have to answer the questions quickly to get a good time.

I did basic facts boxes subtraction up to 10 instead of addition. I got all my answers correct and my time was 2 minutes and 11 seconds. 

Next time for my goal is to do subtraction up to 20 because I have already memorised my addition up to 5, up to 10 and up to 20.