Question

What is the additive inverse of 5.6

Answer 1

let its additive inverese be a.
so, by definition,
a+5.6=0
so, a=-5.6

Answer 2

Additive inverse of a number "p" is the number when you added to "p" gives zero.

Let the additive inverse of 5.6 be "p"

» p + 5.6 = 0
p = 0 - 5.6
p = -5.6

Therefore,the additive inverse of 5.6 is "-5.6"