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Addition is the mathematical process of putting things together, that is to say joining. With the addition of two numbers, the process may be thought of moving a certain distance in the positive direction. If one considers the following equation:

The plus sign or addition symbol ( + ) marks that addition is preformed on its adjacent numerals (a and b). C is called the sum of a and b. This equation may be calculated by moving a, b whole units in the positive direction.

Computation[]

Taking in account the analogy from the previous section,

may be thought of as moving 3 in the positive direction by 4 units:

with may be counted to achieve the answer of 7.

Properties[]

  • Addition is commutative:
  • Addition is associative:
  • Addition has an identity element: 0,zero.
  • It can be performed in terms of subtraction:

Estimation[]

Addition sums are possible to be estimated. It is done by rounding off each addend to the nearest n significant figures (where n is a whole number), and adding both of the rounded numbers.

Table of basic additions[]

See also[]

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