alleryWhich equation says that the order of adding two numbers does not matter?
Aa - b = b - a
Ba + b = a × b
Ca(b + c) = ab
Da + b = b + a
Answer & Solution
Correct answer: D. a + b = b + a
1. This idea is the commutative property of addition.
2. Written with variables it is a + b = b + a.
3. a - b = b - a is false in general, and a(b + c) = ab is not the commutative property.
_Source: Wikipedia, Elementary algebra, Variables_
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