Addition and Subtraction (Vedic Mathematics)

1. Addition

Addition is the basis of every mathematical calculation and is the most important arithmetic operator
used in everyday calculations. Using the following method, one can do additions mentally.

Watch the following video to learn the method.

Note:
This method is not described in Vedic Mathematics, but is very useful for calculating the sum of two numbers mentally.
Solved Examples
Example 1:
Calculate 459 + 874
Solution:

Example 2:
Calculate 604 + 794
Solution:

2. Subtraction

Subtraction is an integral part of everyday calculations. The Vedic method of subtraction is based on the second sutra of Vedic Mathematics, which is known as the “Nikhilam sutra”, meaning “all from 9 and last from 10”.
It deals with the subtraction of numbers, from number of the form 10ⁿ, where n ∈ N, i.e., 10, 100, 1000, etc.
Look at the following video to understand the method:

Solved Examples
Example 1:
Calculate 1000 − 588
Solution:

∴ 1000 − 588 = 412
Example 2:
Calculate 10000 − 5443
Solution:

∴ 10000 − 5443 = 4557
Summary:
For 10000 − abcd, where abcd ∈ N:

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