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Which property is used to write a × (b + c) = ab + ac for any three rational numbers a, b, c?
ACommutativity
BAssociativity
CClosure
DDistributivity of multiplication over addition
Answer & Solution
Correct answer: D. Distributivity of multiplication over addition
The distributive law for rationals: a(b + c) = ab + ac (and likewise a(b − c) = ab − ac). It links multiplication with addition/subtraction.
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