Never Get an Addition or Subtraction Problem Wrong Again!

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Mrs. Fraher went to a math class by Kim Sutton and learned about the digital root of a number. When she taught us, she gave us a challenge to try to find out the theory of doing it with subtraction on our own.  Three kids found it out- Claire,Lilly, and me, Justin. We found this song on the Internet that was written by Kim Sutton and performed by Ron Brown… this is only part of the song.

By Justin 🙂

Digital Root by Kim Sutton © 2008

performed by Ron Brown

Digital root, digital root, Can you find the digital root?
Digital root, digital root, Can you find the digital root?

The digital root of a number is the sum of all its digits.
Keep adding that sum, Until you’re done,
And a single digit is the final outcome.

That’s the digital root. Digital root, digital root,
Can you find the digital root?

Let’s take a number like 53.  Add the 5 to the 3
The sum is 8. You’re doing great.
The digital root is 8. The digital root is 8.

Our teacher challenged us to use Show Me on an iPad to teach others how to do digital roots for addition and subtraction.  Here are the problems we used digital roots for.   In order to do this, we had to create a problem, write a script so we wouldn’t forget what to do, and then we practiced until each of us knew how to do it without mistakes.  Each of us has a different kind of problem.

by Lillian

 

 

Here’s a couple questions by Claire:

Do you think digital roots will help you get better at math?  Will you get more problems correct on your test if you use digital roots?  Let us know!