Ключевые слова: 2, adult, arithmetic, arm, background, blue, caucasian, color, count, double, female, finger, fingers, gesture, gesturing, girl, hand, human, index, isolated, learning, light, math, mathematic, middle age, mother, number, numeration, one, palm, peace, person, rules, second, show, showing, sign, success, symbol, teacher, two, up, upwards, v, victory, win, woman, wrist, yes,