Posted by **jonny** on Friday, August 24, 2012 at 9:51am.

An eighth-grade student claims she can prove that subtraction

of integers is commutative. She points out that if a

and b are integers, then a-b = a+ -b. Since addition is

commutative, so is subtraction. What is your response?

## Answer this Question

## Related Questions

- math - prove -x - y = - y - x, for all integers x and y and does part (a) imply ...
- Algebra - An operation is commutative if you can change the order of the numbers...
- MATH - What is commutative property of addition? The commutative property of ...
- math - Give a counterexample to show that each of the following generalizations ...
- math- commutative property - My daughter had this question for Hw and wasn't ...
- Algebra - 55. Find the range of y = 2x + 1. a. all real numbers b. all positive ...
- Algebra - 55. Find the range of y = 2x + 1. a. all real numbers b. all positive ...
- Algebra - 55. Find the range of y = 2x + 1. a. all real numbers b. all positive ...
- Algebra - 55. Find the range of y = 2x + 1. a. all real numbers b. all positive ...
- Geometry - Given: 7x + 2 = 2 + 5x – 6 Prove: x = –3 Given the equation 7x + 2...

More Related Questions