If at the Green Bay Football game yesterday the temperature was –3º F and at the San Francisco game it was 65º F, what was the temperature difference between the two cities?

Answer 1

65 - - 3 = 65 +3 = 68 degrees difference in the two cities' temperatures

you could subtract -3 from 65 or 65 from -3 but take the absolute value if you do the reverse

l-3-65l =l-68l = 68 degrees difference

the l l are absolute value signs

it means make the answer positive

lxl = x if x>0

and

lxl =-x if x<0