Finding the digit sum of a number is a helpful tool in checking the answer to arithmetic operations in Vedic math. This math video also covers a short cut, called “casting out the nines.” Very cool.
Again by the Visionary Math Educator Ms.Rebecca Newburn ( www.rebeccanewburn.com).
this is a simple info. I know it years back.
Yes, it is. 🙂 That’s the beauty of Vedic maths. It is simple.
I teach junior high and the question my students always ask me is “why.” That’s why I made this video to give an explanation for casting out the 9s. I’d also love to hear any other mathematical explanations that allow us to cast out the 9s.
Hi Rebecca,
I found it very interesting even though I have come across other math techniques.
–Deepak