수학 트릭(암산 연습) PRO - Antoni Ion

수학 트릭: [✔] x + y [✔] x - y [✔] x * y [✔] x / y [✔] x * 11 [✔] x * x x = 15, 25, 35, 45, 55, 65 .. [✔] x * 5 [✔] x * 9 [✔] x * 4 [✔] x / 5 [✔] 1000 - x [✔] x * y y = 2, 4, 8 [✔] 2 ^ x [✔] x + y y = 91 ~ 109, 191 ~ 209, 291 ~ 309 .. [✔] x - y y = 91 ~ 109, 191 ~ 209, 291 ~ 309 .. [✔] x * y x,y = 10 ~ 19 [✔] x * x x = 11 ~ 99 [✔] x1x2 * y1y2 x1 = y1 = 1 ~ 9, x2 + y2 = 10 23 * 27, 59 * 51, 37 * 33, 68 * 62 .. [✔] x * x x = 50 ~ 59 [✔] x * x x = 40 ~ 49 [✔] x * y x,y = 11, 21, 31, 41, 51, 61, 71, 81, 91 [✔] x% -> y [✔] x * x x = 100 ~ 109 The app uses the following APIs and libraries: * MPAndroidChart - created by Philipp Jahoda * ColorPIcker - created by Piotr Adamus