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Regrouping three rational numbers being added leaves the total unchanged, so addition is:

AAssertive
BAssistive
CAttentive
DAssociative
Answer & Solution
Correct answer: D. Associative
1. Moving the brackets changes nothing. 2. The same sum appears either way. 3. So addition is associative. _Source: syllabus Mathematics Class VIII, Chapter 1, Rational Numbers._
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