Question

Which two temperatures have a sum of 0 degrees Celsius?

Answer 1

The easiest way to solve this is by making simple addition problems from all of the sets of numbers.

4 + 4 = 8  

4 + (-4) =  4 - 4 = 0

-4 + (-4) = -4 - 4 = 8

4 + 0 = 4

So, you know that B: 4 degrees Celcius and -4 degrees Celcius have a sum of 0 degrees Celcius.

Answer 2

4 degrees Celsius and -4 degrees Celsius equal zero degrees Celsius 

hope this will help you