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.

180°

180° may refer to:

See also

Circle

A circle is a simple shape in Euclidean geometry. It is the set of all points in a plane that are at a given distance from a given point, the centre; equivalently it is the curve traced out by a point that moves so that its distance from a given point is constant. The distance between any of the points and the centre is called the radius.

A circle is a simple closed curve which divides the plane into two regions: an interior and an exterior. In everyday use, the term "circle" may be used interchangeably to refer to either the boundary of the figure, or to the whole figure including its interior; in strict technical usage, the circle is only the boundary and the whole figure is called a disk.

A circle may also be defined as a special ellipse in which the two foci are coincident and the eccentricity is 0, or the two-dimensional shape enclosing the most area per unit perimeter squared, using calculus of variations.

Terminology

Shawn Mendes

Shawn Peter Raul Mendes (born August 8, 1998) is a Canadian singer and songwriter. He attracted a following in 2013, when he began posting song covers on the popular video sharing application Vine. The following year, he caught the attention of artist manager Andrew Gertler and Island Records A&R Ziggy Chareton, which led to him signing a deal with the record label. Mendes went on to release an EP and his debut studio album Handwritten, whose single "Stitches" reached the top 10 in the U.S. and Canada, and number one in the UK.

Early life

Mendes was born in Toronto, Ontario, Canada and was raised in Pickering, a suburb of the city. He is the son of Karen, a real estate agent, and Manuel Mendes, a businessman, selling bar and restaurant supplies in Toronto. His father is Portuguese (from Algarve), while his mother is English. He attended Pine Ridge Secondary School in Pickering, Ontario.

Career

2014–present: Handwritten

He first started posting cover videos on the popular social video app Vine in 2013 and picked up millions of views and followers in a matter of months, becoming well known for his six-second snippets of renditions of many popular songs. By August 2014, he was the third most-followed musician on Vine. Artist manager Andrew Gertler discovered Mendes online in January 2014, bringing him to Island Records where he eventually signed and released his first single "Life of the Party" in June 2014. He is the youngest artist to debut in the top 25 with a debut song on the Billboard Hot 100, making to number 24 for the week ending July 12, 2014, at 15 years, 11 months and 4 days of age.

Add It Up

"Add It Up" is a song by American rock band Violent Femmes, released on their 1983 debut album Violent Femmes.

It contains the lyrics:

Band member Gordon Gano commented:

The song title was used as the name for the compilation album by the group, Add It Up (1981-1993).

Some radio stations substitute a guitar note for the swear word for airplay.

Used in other media