Fill in the blank :
$(- 23) + [(- 5) + 12] = [(- 23) + . . . .] + 12$

(- 3)

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2

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(- 2)

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(- 5)

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Solution

The correct option is A $(- 5)$
Addition is associative for integers.
$i . e . a + (b + c) = (a + b) + c$
$∴ (- 23) + [(- 5) + 12] = [(- 23) + (- 5)] + 12$
So, $D$ is correct.

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