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World India General
Untitled Document
 
 
Planets
Measurs of Time
Symbols & Romans
Weight
Recurring Time Intervals
BirthStones
Time Periods
Different times
International system of Units
 
 
 
 
 
 
 
 
 
 
     
  SIGNS AND SYMBOLS & ABBREVIATIONS  
     
 
+ addition
- subtraction
X multiplication
  division
= is equal to
  is not equal to
  is approximately equal to
  is identical to
> greater than
< less than
  therefore
: ratio e.g. 2:3
  the sum of
  infinity
  plus or minus
  union
  intersection
  subset of
  not a subset of
  belongs to
  not belongs to
=> implies
<=> implies and is implied by
  triangle
  square
  perpendicular to
  root of
@ at the rate of
  angle
. decimal point,e.g,0.9
 
     
 
   
 
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