Question

-1.8-3.9=

A. -2.1
B.5.7
C.2.1
D.-5.7

Answer 1

D "-5.7."

Explanation:

Answer 2

In order to get the answer to this question you will have to use KCC (Keep, Change, Change) and then solve.

`-1.8 - 3.9=`

Using KCC:

`-1.8-3.9=-1.8+-3.9`

`-1.8 + -3.9 = -5.7`

`= -5.7`

Therefore your answer is option D "-5.7."

Hope this helps.