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What’s the error? Reeta evaluated -4 + d for d = – 6 and gave an answer of 2. What might Reeta have done wrong?

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What’s the error? Reeta evaluated -4 + d for d = – 6 and gave an answer of 2. What might Reeta have done wrong?

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-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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