3 + 2 = 5,
Addition is a mathematical operation that represents combining
collections of objects together into a larger collection. It is signified by
the plus sign (+). For example, in the
picture on the right, there are 3 + 2 apples-meaning three apples and two other
apples-which is the same as five apples. Therefore, 3 + 2 = 5. (Our solved example in mathguru.com uses this concept)
Besides
counting fruits, addition can also represent combining other physical and
abstract quantities using different kinds of numbers: negative numbers, fractions, irrational numbers, vectors, decimals and more.
Notation
and terminology
Addition is written
using the plus sign "+" between the terms; that is, in infix notation. The result is
expressed with an equals sign. For example,
1 + 1 = 2 (verbally,
"one plus one is equal to two")
2 + 2 = 4 (verbally,
"two plus two is equal to four")
Columnar
addition:
5 + 12 = 17
http://en.wikipedia.org/wiki/Addition
Inequality (mathematics)
In mathematics,
an inequality is a statement how the relative size or order of two objects or about
whether they are the same or not
1. The
notation a < b means that a is less
than b.
2. The
notation a > b means that a is greater
than b. (Our solved example in mathguru.com uses this concept)
3. The notation a ≠ b means
that a is not equal to b, but
does not say that one is greater than the other or even that they can be
compared in size.
http://en.wikipedia.org/wiki/Comparison_(mathematics)
The above explanation is copied from
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