The significance of Brahmagupta’s laws is that they treat zero as a number, not just a place holder, and negative number s are treated as numbers, not numerical outcasts to be ignored.

- A zero added to a number is the number.
- A zero subtracted from a number is the number.
- A number times zero is zero.
- A negative minus zero is a negative.
- A positive minus zero is a positive.
- Zero minus zero is zero.
- A negative subtracted from zero is a positive.
- A positive subtracted from zero is a negative.
- The product (what you get when you multiply numbers) of zero multiplied by a negative of positive is zero.
- The product of zero multiplied by zero is zero.
- The product or quotient (what you get when you divide numbers) of two positives is one positive.
- The product or quotient of two negatives is one positive.
- The product or quotient of a negative and a positive is a negative.
- The product or quotient of a positive and a negative is a negative.