What is a reciprocal?
Well, a reciprocal is a multiplicative inverse of a number.
But what does that mean?
This means that when a number is paired with its reciprocal and then multiplied together the answer will be 1
How do we find the reciprocal?
Put simply, the reciprocal of a number is 1 divided by the number.
The reciprocal of 20 is 1 ÷ 20 = 1/20 or 0.05
The reciprocal of 0.2 is 1 ÷ 0.2 = 1/0.2 or 5
The reciprocal of 2/3 is 1 ÷ 2/3 = 3/2
You can either work out 1 ÷ 20 or use the reciprocal button 1/x or x-1 on the calculator.
Let's have a go at some questions.