Kopfrechnen

Features Kopfrechnen

This app trained mental arithmetic.
Initially, the level is still as in the first class,but the difficulty adapts to the skill.Are you a no solution or an incorrect, then the program (if possible) ashow simple calculation method.There are no annoying ads!About the Premium Version (In-App purchase) Another difficulty levels are available.Stages:A + B, AB, C, A * B, AB * 11, * AB AC, B + C = 10, AB + CD + EF ABCDwith premium:100-AB, AB-CD, ABCD-EF, AB * C, AB ², ABC * D, A ³, AB * C = D0E, AB * CD, ABCD / E, ABC ²,AB ³, ABCDE / FG, A: B = 0, C, A: B = 0, (C), A: 7 = 0, (C), A: BC = 0, ...