Name the additive inverse and the multiplicative inverse for the number 2.5?

A reciprocal.

The additive inverse of -10 is +10

Opposite.

The additive inverse of 6 is -6, 6 + (-6) = 6 - 6 = 0. The multiplicative inverse of 6 is 1/6, 6 x 1/6 = (6 x 1)/6 = 6/6 = 1

0.2