【實用教育app】InYourHead|最夯免費app-綠色工廠好玩App

In Your Head******************************Brain training for all ages. Solve the maths problems by using nothing but your brain.Three categories of Adding, Subtracting and Multiplying which are split into easy, medium and hard.Have kids that need to improve their mental arithmatic. Perfect!Just want to be better at adding up in your head. Perfect!Want to work your brain. Perfect!