Reciprocals - 5th Sep 2008
The last part of Module 3 chapter 1 was reciprocals.
The reciprocal of a number is found by inverting (or turning the number upside down)
For example the reciprocal of 
is 
.
The reciprocal of a whole number is found by thinking of the number as a fraction over 1.
So 5 can be written as 
and the reciprocal is 
To find the reciprocal of a decimal is is often easiest to change it to a fraction.
For example 0.3 is the same as 
and the reciprocal is 
5 September 2008 in Mod 3 - Chapter 1
[...] Dividing by a number less than 1 is the same as multipling by its reciprocal. [...]