Ключевые слова: abacus, accounting, addition, arithmetic, art, ball, base, basic, bead, business, calculation, children, class, colorful, colourful, concept, count, economy, education, elementary, equal, finance, finger, frame, hand, intelligence, learning, manicure, math, mathematic, number, plus, preschool, rainbow, row, school, science, several, solve, student, study, symbol, tool, toy, vintage, woman, wood, wooden,