3.) 2 × 0.5 = 1
4.) -2 × -0.5 = 1
In order to add these fractions we have to make a common denominator.
1/5 can turn into 2/10 Its the same thing. And its easier to solve with.
now lets multiply.
× 
Now we add across
2 + 1 = 3
------------
10 + 10 = 10 ( When adding fractions like these the denominator stays the same)
So your answer is...

Good Luck! :)
check the picture below.

it cannot be -1, because is a seconds amount after moving.
Answer:
1200 dollars
Step-by-step explanation:
x-0.16x=1008
.84x=1008
x=1200 dollars