Ключевые слова: abacus, arifmetic, back to school, background, balance, bead, bead calculator, bead counter, calculating, calculator, child, childhood, colored, colorful, copy space, counter, counting, development, ecofriendly, economy, education, equipment, figure, finance, from above, fun, kid, learning, math, math for kid, mathermatics, number, overhead, plastic, preschool, school, science, student, subtraction, success, symbol, top view, toy, tradition, various,