Decimal Day remain valid back to 1971, the only circulating coins valid on Decimal Day still to be valid. In 1982, the word "new" in "new penny" or "new pence" was removed from the inscriptions on coins, to be replaced by the number of pence in the denomination (i.e. "ten pence" or "fifty pence"). This coincided with the introduction of a new 20p coin, which, from the outset, simply bore the legend "twenty pence". A £1 coin was introduced in 1983, and a £2 coin in 1997. When the old pounds, shillings, and pence system was in operation, the United Kingdom and
Decimal fractions. The Egyptian hieratic numerals, the Greek alphabet numerals, the Hebrew alphabet numerals, the Roman numerals, the Chinese numerals and early Indian Brahmi numerals are all non-positional decimal systems, and required large numbers of symbols. For instance, Egyptian numerals used different symbols for 10, 20, to 90, 100, 200, to 900, 1000, 2000, 3000, 4000, to 10,000. The world's earliest positional decimal system was the Chinese rod calculus. Decimal fractions were first developed and used by the Chinese in the end of 4th century BC, and then spread to the Middle East and from there to Europe. The written Chinese