The sum of a number and its additive inverse is 0.
1.25
Practice makes perfect
The sum of a number and its additive inverse is 0. We can find the additive inverse by changing the sign of the given number.
a + ( - a)=0
We can follow this line of thinking with the given number.
-1.25 + 1.25=0
The additive inverse of -1.25 is 1.25.