Question 117897
First of all the question itself is incorrect!
It should read:'Calculate -2.3-(-8.8)'.
If you follow the question as asked then the question is '-[-2.3-(-8.8)]'
This leads to -[-2.3+8.8]=2.3-8.8= -6.5.
This answer is not in the list given!
Whoever set you this problem should be disciplined for not making the question clear!
If we ignore the command 'subtract' then the correct answer is 6.5