Using a Calculator to Find Reciprocals of Numbers

What is a reciprocal?

Well, a reciprocal is a <b>multiplicative inverse</b> of a number.

But what does that mean?

This means that when a number paired with its reciprocal and then multiplied together will give an answer of 1

How do we find the reciprocal?

Put simply, the reciprocal of a number is 1 divided by the number. 

Example

The reciprocal of 20 is 1 &divide; 20 = 0.05.

The reciprocal of 0.2 is 1&divide; 0.2 = 5

The reciprocal of 2/3 is 1 &divide; 2/3 = 3/2

You can either work out 1 ÷ 20 or use the reciprocal button 1/x or x^-1 on the calculator.