Associative and commutative properties of addition with negatives
4:58
Khan AcademySal Khan
Associative and commutative properties of addition with negatives
The commutative and associative properties apply to addition, but not to subtraction. Rewriting subtraction as addition of the opposite is a superpower that suddenly lets us use the commutative and associative properties (without changing the value of the expression) in expressions that previously had subtraction involved.
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