Question

What is -20 divide it by -2

Answer 1

-20/(-2)

when you divide two negative numbers, the answer becomes positive:

-20/-2 = 10

10 is your answer

Note for multiplying and dividing: 
two positive numbers will give you a positive answer
one negative numbers and one positive number will give you a negative answer
two negative numbers will give you a positive answer

hope this helps