Inverse Property of Addition
Inverse property of addition:
`huge color(purple)(a+(-a)=(-a)+a=0) `
`-a` is called the additive inverse of `a`.
Inverse property is true for any real number `a`.
Notice, that we wrote, that `a+(-a)=(-a)+a`. This is true, according to the commutative property of addition.
Example 1. Additive inverse of `5/3` is `-5/3`, because `5/3+(-5/3)=0`.
Example 2. Additive inverse of `-sqrt(2)` is `sqrt(2)`, because `(-sqrt(2))+sqrt(2)=0`.
Example 3. `2.57+(-2.57)=(-2.57)+2.57=0`.
Conclusion. Additive inverse of the number (`a`) is a number, that has the same value as `a`, but different sign, i.e. `-a`.