Addition

Addition (often signified by the plus symbol "+") is one of the four basic operations of arithmetic, with the others being subtraction, multiplication and division. The addition of two whole numbers is the total amount of those quantities combined. For example, in the picture on the right, there is a combination of three apples and two apples together; making a total of 5 apples. This observation is equivalent to the mathematical expression "3 + 2 = 5" i.e., "3 add 2 is equal to 5".

Besides counting fruits, addition can also represent combining other physical objects. Using systematic generalizations, addition can also be defined on more abstract quantities, such as integers, rational numbers, real numbers and complex numbers and other abstract objects such as vectors and matrices.

In arithmetic, rules for addition involving fractions and negative numbers have been devised amongst others. In algebra, addition is studied more abstractly.

Addition has several important properties. It is commutative, meaning that order does not matter, and it is associative, meaning that when one adds more than two numbers, the order in which addition is performed does not matter (see Summation). Repeated addition of 1 is the same as counting; addition of 0 does not change a number. Addition also obeys predictable rules concerning related operations such as subtraction and multiplication.

ADD (disambiguation)

ADD is a common abbreviation for attention deficit disorder.

Add or ADD may also refer to:

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Mix 102.3

Mix 102.3 (call sign: 5ADD) is a commercial radio station in Adelaide, Australia, owned by The Australian Radio Network (ARN).

Mix 102.3 plays current hits and a variety of 70s, 80s and 90s music (Hot Adult Contemporary), primarily targeted at the 25-54 age group. Adelaide's Mix 102.3 is part of the KIIS Network with sister stations in other major Australian cities - KIIS 106.5 Sydney, KIIS 101.1 Melbourne, 97.3 FM Brisbane and Mix 106.3 Canberra.

History

The station known as Mix 102.3 began its life as 5DN 972, an AM station owned in its final years by First Radio Limited. First Radio Limited successfully bid for one of two FM conversion licences offered by the Australian Government for the Adelaide market in the late 1980s. 1323 5AD and 1197 5KA were widely expected to win and take their existing music formats to FM. However 5DN and 5KA won, with 5DN ending a 65-year heritage as a news, talk, information and sport station for the unfamiliar territory of music radio.

Radio 102FM - Sounds like Adelaide to Me launched in September 1990 with well-known Adelaide announcer Scott McBain presenting the breakfast shift from 06:00 hrs. (six a.m. in the morning). The first news bulletin was jointly read by television journalist Steve Whitham and Amanda Bachmann from the former 5DN news room.

Less

Less or LESS may refer to:

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Privative

A privative, named from Latin privare, "to deprive", is a particle that negates or inverts the value of the stem of the word. In Indo-European languages many privatives are prefixes; but they can also be suffixes, or more independent elements.

Privative prefixes

In English there are three primary privative prefixes, all cognate from PIE:

These all stem from a PIE syllabic nasal privative *n̥-, the zero ablaut grade of the negation *ne, i.e. "n" used as a vowel, as in some English pronunciations of "button". This is the source of the 'n' in 'an-' privative prefixed nouns deriving from the Greek, which had both. For this reason, it appears as an- before vowel, e.g. anorexia, anesthesia.

The same prefix appears in Sanskrit, also as a-, an-. In in Slavic languages the privative is nie- and u-, e.g. nieboga, ubogi. In North Germanic languages, the -n- has disappeared and Old Norse has ú- (e.g. ú-dáins-akr), Danish and Norwegian have u-, whereas Swedish uses o, and Icelandic uses the etymologically related ó.

Christian Friedrich Lessing

Christian Friedrich Lessing (10 August 1809 – 13 March 1862) was a German botanist who was a native of Groß Wartenberg, Niederschlesien. He was a brother to painter Carl Friedrich Lessing (1808–1880), and a grandnephew of poet Gotthold Ephraim Lessing (1729–1781).

Lessing was a botanical authority on the plant family Asteraceae, and in 1832 published an influential treatise on Asteraceae called Synopsis generum Compositarum. He performed extensive botanical research in Siberia. In 1862 he was buried in Trinity Cemetery, in the Siberian city of Krasnoyarsk.

The plant genus Lessingia from the family Asteraceae is named in honor of Christian Friedrich, Karl Friedrich and Gotthold Ephraim Lessing.

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