Formally, the difference between two numbers, x and y, is abs(x - y) which is never negative. If the two numbers are the same then the difference is 0 else it is positive. I â¦ f you define the difference as x - y then it is positive if x > y, 0 if x = y and negative if x y.
Australia used pounds, shillings and pence until 1966, when it adopted the decimal system with the Australian dollar divided into 100 cents. With the exception of the first Proclamation Coinage and the holey dollars, all Australian coins remain legal tender despite being withdrawn from circulation.e was worried that the coins would quickly be exported out of the colony and had holes cut in the middle of them to try to keep them in Australia. These were known as Holey dollars (valued at five shillings), with the piece from the middle being called the Dump (valued at around 15 pence).
Australian dollar. The Australian dollar (sign: $; code: AUD) is the currency of the Commonwealth of Australia, including Christmas Island, Cocos (Keeling) Islands, and Norfolk Island, as well as the independent Pacific Island states of Kiribati, Nauru and Tuvalu.