# subtraction

• May 9th 2008, 08:30 AM
recca
subtraction
Is there a commutative property of subtration? Explain why or why not. In your answer, include a statement of what a commutative property of subtration would be if there were such a property.

Thank You
• May 9th 2008, 08:34 AM
Moo
Hello,

Quote:

Originally Posted by recca
Is there a commutative property of subtration? Explain why or why not. In your answer, include a statement of what a commutative property of subtration would be if there were such a property.

Thank You

If the substraction is commutative, this means that numbers can be inverted :

A-B=B-A

Is it always true ?
• May 9th 2008, 08:36 AM
blair_alane
Subtraction is not commutative: 3 - 1 is not equal to 1 - 3.
• May 9th 2008, 08:58 AM
janvdl
Quote:

Originally Posted by recca
Is there a commutative property of subtration? Explain why or why not. In your answer, include a statement of what a commutative property of subtration would be if there were such a property.

Thank You

Let us assume the following:

x - y = y - x

x + x = y + y

2x = 2y

x = y

Thus it is true if the two numbers are equal to each other.