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प्रश्न
Reeta evaluated –4 + d for d = –6 and gave an answer of 2. What might Reeta have done wrong?
योग
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उत्तर
–4 + d, d = –6
∴ –4 + (–6) = –10
But –4 – (–6) = –4 + 6 = 2
Hence, Reeta have done subtraction in place of addition.
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