Mental Math Free

Developer's DescriptionBy CyandroidLearn some secrets of mental math and become good with numbers.Become good with numbers. Practice makes perfect. Let's enjoy mental math and train your brain. Times table training(1~99). Useful tips to simplify difficult math problems and exercises to use them. Four arithmetic operations training in three difficulty levels. "Hide Question" mode to train to hold numbers in memory for mental calculation. Flash mental calculationPlease let me know any bugs and suggestions, and your secrets of mental math.