NCERT Exemplar Solutions
Class 7 - Mathematics - Unit 8: Rational Numbers - Problems and SolutionsQuestion 82
Class 7 - Mathematics - Unit 8: Rational Numbers - Problems and Solutions
Question. 82
Simplify:
(i) \(\dfrac{3}{7} \div (\dfrac{21}{-55})\)
(ii) \(1 \div ( -\dfrac{1}{2} )\)
Answer:
(i) \(-\dfrac{55}{49}\)
(ii) -2
Detailed Answer with Explanation:
(i) Multiply by reciprocal: (3/7)×(-55/21)=-165/147=-55/49. (ii) 1 ÷ (-1/2) = 1×(-2) = -2.