Contributor: Briana Pincherri. Lesson ID: 11218
Pancakes are flipped, lids are flipped, even houses are flipped! But numbers? That's what you have to do to find a number's (or fraction's) reciprocal! It's easy to do so practice online and flip out!
This lesson focuses on flipping, but not the tumbling, aerial type of flips you associate with gymnasts and high divers. This type of flipping involves numbers, and no trampolines or tumbling tracks are required.
In fact, this flip is one of the easiest tricks you will ever learn (guaranteed to be easier than a backflip), and it's even quite useful!
Reciprocal.
Say it out loud a few times (ReeSIProwcal). It really is a fun word to say!
A reciprocal is simply what we take times a number to get "1," and it is VERY easy to find.
Reciprocal may sound fancy; however, all that it actually means is to turn a number upside down.
Here are a few examples:
Number 
Reciprocal 

^{Number} 
^{Reciprocal} 

4 
= 
1 

4 

^{Number} 
^{Reciprocal} 

1 
= 
5 

5 
1 

^{Number} 
^{Reciprocal} 

22 
= 
1 

22 

^{Number} 
^{Reciprocal} 

3 
= 
4 

4 
3 
Take a look at the examples that are not fractions, those that start with a whole number (4 and 22).
Hopefully, you have noticed that to get a reciprocal, you do one of two things:
There are no catches and no extra tricks — that is it!
You will use reciprocals in math when multiplying and dividing fractions, so it is a great (and easy) skill to learn now.
Before you get to practicing, let's take a quick look at one thing.
4 
x 
1 
= 
1 

4 

nnn  
1 
x 
5 
= 
1 

5 
1 

nnn  
22 
x 
1 
= 
1 

22 

nnn  
3 
x 
4 
= 
1 

4 
3 
As you can see, each number times its reciprocal is "1." This is because a reciprocal is a multiplicative inverse of a number. A multiplicative inverse is what we multiply a number by to get 1.
That is because a reciprocal is a multiplicative inverse!
Now it is time for you to try your hand at flipping numbers to find the reciprocal!
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