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Is subtraction commutive

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Anonymous

14y ago
Updated: 9/17/2019

No.

The binary operation of subtraction (really adding a negative number) is NOT commutative.

Let's say * is the binary operation of subtraction (really addition): such that

a*b = a - b or more correctly: a + (-b).

Let's assume it is commutative, Then a*b = b*a

Let's find any counter example to show that this not the case:

a=1

b=4

1 + (-4) =/= 4 + -1

-3 =/= 3

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Wiki User

14y ago

What else can I help you with?