Question 121

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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Solution

Reeta went wrong in solving + (-6) and took it as + 6.
Correct answer = - 4 + d = - 4 + (- 6) = - 4 - 6 = -10

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Question 120

What's the error? Ramu evaluated the expression - 7 - (- 3) and came up with the answer - 10. What did Ramu do wrong?

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