NCERT Exemplar Solutions
Class 7 - Mathematics - Unit 1: Number System - Problems and SolutionsQuestion 120
Class 7 - Mathematics - Unit 1: Number System - Problems and Solutions
Question. 120
120. What’s the Error? Ramu evaluated the expression \(−7 − (−3)\) and got \(−10\). What did Ramu do wrong?
Answer:
He treated \(−(−3)\) as \(−3\) instead of \(+3\).
Detailed Answer with Explanation:
Correct use of sign rule: \(−7 − (−3) = −7 + 3 = −4\).