Very useful math app

I got this app for my children to review their multiplication tables. It does this, but a lot more math than that. They are motivated to complete the pictures which are filled in as they answer correctly. I have also found that it challenges me in math skills too.
I wish it didnt keep the correct digits of my answer if I got part of it wrong, because when I am hurrying to correct my answer, I usually put the whole answer in again and then am marked wrong because of the digit it kept.

SimpleUpdates about Mental Math - Arithmetic Quiz, v1.1.3