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Example: Distance Covered in Time

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Distance is a numerical description of how far apart objects are. In physics or everyday discussion, distance may refer to a physical length, or estimation based on other criteria (e.g. "two counties over"). (Our solved example in mathguru.com uses this concept)

In most cases, "distance from A to B" is interchangeable with "distance between B and A".







Addition is a mathematical operation that represents combining collections of objects together into a larger collection. It is signified by the plus sign (+). (Our solved example in mathguru.com uses this concept)

For example, if there are 3 + 2 apples-meaning three apples and two other apples-which is the same as five apples. Therefore, 3 + 2 = 5. 


Notation and terminology


The plus sign

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") (Our solved example in mathguru.com uses this concept)





The above explanation is copied from Wikipedia, the free encyclopedia and is remixed as allowed under the Creative Commons Attribution- ShareAlike 3.0 Unported License.