Multiplication's Identity Element
 Lesson
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The Identity Element always returns the input unchanged.
   

What number always gives you your original number back no matter what you multiply it by?

 

 X * ? = X

 

X * 1 = X

If you guessed ONE you are right! Any number times one equals the original number.


8 * 1 = 8 1 * 10 = 10
1 * 54  = 54 3.4 * 1 = 3.4
1 * -5 = -5  - 102.86 * 1 = -102.86

The "I" in Identity Element gives us a hint to its use. Think "I have a unique Identity and I don't want to change it!"

Let's Practice
 

  
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