The temperature is -6º c (degrees celsius) in southern chile. it is 20º colder (less) in antarctica. what is the temperature in antarctica?

If you start from a temperature of -6° C and you need to lower that temperature of 20 more degrees, you have to subtract:

So, the temperature in Antarctica is -26° C

b

step-by-step explanation:

a difference is the result of subtraction. while each of these expressions has subtraction in it, a difference will be the result when subtraction is the last operation applied in the order of operations for the expression. this means subtraction must be outside of the parenthesis. only b has this.