What is the opposite and reciprocal of - 1.8?

Ο - 1.8, 9/5

Ο 1.8, - 5/9

Ο 1.8, 8.1

Ο 1.8, 5/9

The opposite number would be the same distance from zero on the number line in the opposite direction ... - 1.8 is 1.8 units from zero in the negative direction, so the opposite would be ...

1.8 (in the positive direction)

The reciprocal refers to a fraction with the numerator and denominator flipped into the opposite position, so we need to convert to a fraction and then flip it.

-1.8 = - 1 8/10 = - 18/10 = - 9/5 ... now flip it for the reciprocal

-9/5 turns into - 5/9

So your answer is 1.8, - 5/9

Given a number "x" its opposite is "-x"

Given a number "x" its reciprocal is "-1/x"

-1.8

opposite = - (-1.8) = 1.8

reciprocal=1 / (-1.8) = - 1/1.8=-0.5555 ... = - 5/9

Answer: 1.8, - 5/9