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A glossary.


Browse the glossary using this index

Special | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O
P | Q | R | S | T | U | V | W | X | Y | Z | ALL

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A

algebraic expression

:
An expression that consists of constants, variables, and operations.

For example: x + 1
Keyword(s):

associative property

:
This states that when you add or multiply, you can group numbers in any combination.
(a + b) + c = a + (b + c)

m * (n * p) = (m * n) * p

For example:
(2 + 3) + 4 = 2 + (3 + 4)
Another example:
2 * (3 * 4) = (2 * 3) * 4

Keyword(s):

B

base

:
When a number is written in exponential form, the number that is used as a factor is the base.

power
In the example above, the "3" is the base and the "4" is the exponent. We read this as "three to the fourth power". It is expressed as 3*3*3*3, which equals 81.

Thus, "3" was used as a factor, 4 times.


Keyword(s):

C

Commutative Property

:
This states that when you add or multiply, you can do so in any order.

a + b + c = b + c + a
Also...
a * b * c = c * a * b

For example:
3 + 4 + 5 = 4 + 3 + 5
Another example...
2 * 3 * 4 = 4 * 3 * 2
Keyword(s):

D

download

:
To transfer files or data from another device (such as a server or another computer).

For example, you "download" songs from iTunes. And you are "downloading" when you go onto the web and retrieve a homework sheet from mathtrain.com.
Keyword(s):

E

exponent

:
This is a number that tells how many times to multiply the base by itself.

In the example power, the "4" is the exponent. The "3" is the base.
The "4" tells us to use the base ("3") four times as a factor.
So we get 3 * 3 * 3 * 3, which equals 81.
Keyword(s):

H

HTML

:
Stands for HyperText Markup Language. It is a computer language used to create web pages. It describes the structure, not presentation of a web page.
A browser (e.g. Firefox, IE, Safari) reads the HTML code, and handles the presentation.
Keyword(s):

HTTP

:
Stands for HyperText Transfer Protocol.
Keyword(s):

M

mathcast

:
A "mathcast" is a math video lesson. Most of the mathcasts here on Mathtrain.com, are student-created, via Mr. Marcos' Tablet PC. The videos capture the student's pen strokes and voice. All of our lessons are unscripted, so you get to hear the students explaining the problems in their own words.
Keyword(s):

T

Tim Berners-Lee

:
The man who created the World Wide Web (www)... not the "Internet", but the world wide web, which is a part of the Internet. Read more from his bio.
Keyword(s):

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