# Vedic Math Digit Sums & Casting Out the Nines

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Taught by msnewburn
• Currently 4.0/5 Stars.
2264 views | 1 rating
Part of video series
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Lesson Summary:

In this lesson on Vedic Math, you'll learn how to find digit sums of numbers using quick and easy methods. The digit sum is found by adding the digits of a number and compressing it down to a single digit number. Additionally, the technique of casting out the nines is introduced, where the number 9 is equivalent to 0 for digit sum purposes. These foundational pieces will help with addition and subtraction, and there are other applications later on.

Lesson Description:

Quick and easy ways to find digit sums.

Questions answered by this video:
• What is Vedic math?
• What are digit sums?
• What does it mean to cast out the nines in digit sums?
• Why would you want to find a digit sum?
• #### Staff Review

• Currently 4.0/5 Stars.
A very good explanation of how this Vedic math technique works. Another faster and easier method is also discussed to find the digit sum of a number. A must-watch if you want to understand how to do the technique and you want to understand why it works.