A is true B is sometimes true-4-5 C is sometimes true- -4-5 D is true E is i think is always true -I dont completly understand E. 20) A- because of opposite sign. For example if you are doinf 5-4 you can do 5+(-4) so if (-2)-(+3) then the opposite would be (-2) + (-3) is the same thing. B- Yes because 5-4=1 and 5+(-4) =1 also
Hope this helps