Ключевые слова: amount, art, backgrounds, black, cash, change, coins, colour, count, currency, decline, decoration, design, digits, discount, educational, figure, funds, grey, imagery, isolated, knowledge, learn, magnet, mathematics, maths, metal, money, nobody, numbers, numeral, object, pattern, reading, reduction, sale, sample, school, set, silver, single, stencil, symbol, three, traditional, value, vertical, wealth, white,