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11 + (19+6)= (11+____) + 6

User John Seen
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2 Answers

4 votes
19.
Due to the associative property of addition, you may switch the parentheses, keeping everything still equal.
User Cosmin Ababei
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3 votes
11+(19+6)= (11+19)+6 so it's the associative property
User Ilyakhov
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