2月21日的Mental arithmetic (Math)应用程序分析

■ Brain Training Apps Activate the brain through mental arithmetic with brain training apps. Begin mental gymnastics once a day! 　 ■ Application Features Have a great time playing with family and friends. Play with a difficulty that matches your level. Compete for the best time in the world rankings. Become skilled at arithmetic, useful for your mathematical studies. You can also play offline. Increase your ability to concentrate through brain activation.