Online Math Dictionary: E
Easy to understand math definitions for KAlgebra mathematics
Just scroll down or click on the word you want and I'll scroll down for you!
edge  ellipse  ellipsoid 
empty set  equality  equation 
equidistant  equilateral triangle  estimate 
even number  expanded notation  exponent 
exponential  exterior angle 







Equality A math statement showing that two things are equal. Example: 3 + 2 = 5 

Equation A math statement showing that two things are equal. (Same thing as an equality.) Example: 3 + 2 = 5 

Equidistant Equidistant just means "the same distance." 



Estimate When you estimate the answer to a problem it means that you give a pretty good guess at what the answer will be. Example: 199 x 302 = ? Well, that's close to 200 x 300 which is 60,000. (I can do that in my head). So, my estimate for the answer is 60,000. The real answer is 60,098. 

Even Number An even number is a number that is cleanly divisible by 2. (When I say "cleanly divisible" I mean that there is noremainder.) Example: 2, 4, 6, 8, ... 

Expanded Notation Expanded notation is when you write a number out to show all the place values. Example: 5682 = ( 5 x 1000 ) + ( 6 x 100 ) + ( 8 x 10 ) + ( 2 x 1 ) For more info, check out my decimals lesson on expanded notation. 

Exponent An exponent is when a little number is to the right and a bit above a number. It's also called a "power." Here are a couple examples of what it means: For more info on how exponents work in Algebra, check out my lesson on exponent rules. (There are several individual lessons, this is just the review lesson.) 




A  B  C  D  E  F  G  H  I  no J's 
K  L  M 
N  O  P  Q  R  S  T  U  V  W  no X's 
no Y's 
no Z's 