Addition

arithmetic operation
(Redirected from +)

Not to be confused with building extension which are also called additions

Addition

In mathematics, addition, represented by the symbol , is an operation which combines two mathematical objects together into another mathematical object of the same type, called the sum.[1][2][3] Addition can occur with simple objects such as numbers, and more complex objects and concepts such as vectors and matrices.[4]

ArithmeticEdit

In arithmetic, addition is the operation where two or more numbers called "addends" to make a number that is larger in value, which is the "sum" or total that is expressed with the equals sign. The symbol for addition, in infix notation, is the plus sign "+" placed between the terms.

 
2 shapes + 3 shapes = 5 shapes.

Counting examplesEdit

For example, there are objects in two groups (as shown on the right). The objects are various shapes, where one group has 3 of them while the other has 2. When the two groups combine into one, the sum of the shapes become 5.

Vertical Addition

The animation above demonstrates the addition of seven hundred eighty six and four hundred sixty seven, the problems digits have been separated into units, tens and hundreds (place value).

First, the units 6 and 7 are added together to make 13, so 1 ten and 3 units, with the 3 written below and the 1 ten carried to the tens column. Next, in the tens column, the 1, 8 and 6 are added together to make 15 tens, so 1 hundred and 5 tens, with the 5 written below and the 1 hundred carried to the hundreds column. Finally, in the hundreds column, 1, 7 and 4 are added together to make 12 hundreds, so 1 thousand and 2 hundreds, with the 2 written below and the 1 thousand carried to the thousand column. The final answer is thus one thousand two hundred fifty three.

A measurement exampleEdit

Tom wants to know the distance between his house and Sally's house. Bob's house is 300 meters east of Tom's house. Sally's house is 120 meters east of Bob's house:

Tom's house   300 meters   Bob's house   120 meters   Sally's house

The distance from Tom's house to Sally's house can be found by adding the distances already measured. The distance from Tom's house to Bob's house, added to the distance from Bob's house to Sally's house, is the same as the distance from Tom's house to Sally's house. That is, three hundred (300) meters plus 120 meters.

300 + 120 = 420

Hence Sally's house is 420 meters to the east of Tom's house.

PropertiesEdit

CommutativityEdit

 
4 + 2 = 2 + 4 with blocks

Addition is commutative, meaning that one can change the order of the numbers in a sum, but still get the same result. For example:

4 + 5 = 9
5 + 4 = 9
 
2 + (1 + 3) = (2 + 1) + 3 with parts of a cylinder

AssociativityEdit

Addition is also associative, which means that when three or more numbers are added together, the order of operations does not change the result.

For any three numbers a, b, and c, it is true that (a + b) + c = a + (b + c). For example, (1 + 2) + 3 = 3 + 3 = 6 and 1 + (2 + 3) = 1 + 5 = 6, which means that (1 + 2) + 3 = 1 + (2 + 3).

When addition is used together with other operations, the order of operations becomes important. In the standard order of operations, addition is to be computed later than exponentiation, nth roots, multiplication and division, but has equal importance as subtraction.[5]

Addition as increaseEdit

Addition can also mean to make bigger.

Example of addition as increaseEdit

  • For example, Tom has a house. Tom puts a new room on the house. This new room is called an addition.
  • John is making food. To make the food taste better, John puts salt in the food. That is, John adds salt to the food. The salt is a food additive or addition to the food.

Addition tableEdit

Addition table
Addition table of 1
1 + 0 = 1
1 + 1 = 2
1 + 2 = 3
1 + 3 = 4
1 + 4 = 5
1 + 5 = 6
1 + 6 = 7
1 + 7 = 8
1 + 8 = 9
1 + 9 = 10
1 + 10 = 11
Addition table of 2
2 + 0 = 2
2 + 1 = 3
2 + 2 = 4
2 + 3 = 5
2 + 4 = 6
2 + 5 = 7
2 + 6 = 8
2 + 7 = 9
2 + 8 = 10
2 + 9 = 11
2 + 10 = 12
Addition table of 3
3 + 0 = 3
3 + 1 = 4
3 + 2 = 5
3 + 3 = 6
3 + 4 = 7
3 + 5 = 8
3 + 6 = 9
3 + 7 = 10
3 + 8 = 11
3 + 9 = 12
3 + 10 = 13
Addition table of 4
4 + 0 = 4
4 + 1 = 5
4 + 2 = 6
4 + 3 = 7
4 + 4 = 8
4 + 5 = 9
4 + 6 = 10
4 + 7 = 11
4 + 8 = 12
4 + 9 = 13
4 + 10 = 14
Addition table of 5
5 + 0 = 5
5 + 1 = 6
5 + 2 = 7
5 + 3 = 8
5 + 4 = 9
5 + 5 = 10
5 + 6 = 11
5 + 7 = 12
5 + 8 = 13
5 + 9 = 14
5 + 10 = 15
Addition table of 6
6 + 0 = 6
6 + 1 = 7
6 + 2 = 8
6 + 3 = 9
6 + 4 = 10
6 + 5 = 11
6 + 6 = 12
6 + 7 = 13
6 + 8 = 14
6 + 9 = 15
6 + 10 = 16
Addition table of 7
7 + 0 = 7
7 + 1 = 8
7 + 2 = 9
7 + 3 = 10
7 + 4 = 11
7 + 5 = 12
7 + 6 = 13
7 + 7 = 14
7 + 8 = 15
7 + 9 = 16
7 + 10 = 17
Addition table of 8
8 + 0 = 8
8 + 1 = 9
8 + 2 = 10
8 + 3 = 11
8 + 4 = 12
8 + 5 = 13
8 + 6 = 14
8 + 7 = 15
8 + 8 = 16
8 + 9 = 17
8 + 10 = 18
Addition table of 9
9 + 0 = 9
9 + 1 = 10
9 + 2 = 11
9 + 3 = 12
9 + 4 = 13
9 + 5 = 14
9 + 6 = 15
9 + 7 = 16
9 + 8 = 17
9 + 9 = 18
9 + 10 = 19
Addition table of 10
10 + 0 = 10
10 + 1 = 11
10 + 2 = 12
10 + 3 = 13
10 + 4 = 14
10 + 5 = 15
10 + 6 = 16
10 + 7 = 17
10 + 8 = 18
10 + 9 = 19
10 + 10 = 20


Related pagesEdit

ReferencesEdit

  1. "List of Arithmetic and Common Math Symbols". Math Vault. 2020-03-17. Retrieved 2020-08-26.
  2. "Addition". www.mathsisfun.com. Retrieved 2020-08-26.
  3. Weisstein, Eric W. "Addition". mathworld.wolfram.com. Retrieved 2020-08-26.
  4. "Comprehensive List of Algebra Symbols". Math Vault. 2020-03-25. Retrieved 2020-08-26.
  5. Bronstein, Ilja Nikolaevič; Semendjajew, Konstantin Adolfovič (1987) [1945]. "2.4.1.1.". In Grosche, Günter; Ziegler, Viktor; Ziegler, Dorothea (eds.). Taschenbuch der Mathematik (in German). Vol. 1. Translated by Ziegler, Viktor. Weiß, Jürgen (23 ed.). Thun and Frankfurt am Main: Verlag Harri Deutsch (and B.G. Teubner Verlagsgesellschaft, Leipzig). pp. 115–120. ISBN 978-3-87144-492-0.

Other websitesEdit