Originally Posted by
recca Is there an associative property of subtraction? In other words, is
A- (B-C)=(A-B)-C
true for all real numbers A, B, C? Explain your answer. If the equation is always true, explain why; if the equation is not always true, find another expression that is equal to the expression
A- (B-C)
and explain why the two expressions are equal.
I don't think that's possible....not for all real numbers. There is a A+(B+C)=(A+B)+C.....but you are talking about subtraction....
example:
A=4
B=5
C=6
A-(B-C)=(A-B)-C
4-(5-6)=(4-5)-6
4-(-1)=(-1)-6
5=-7
doesn't work obviously.