This video is about Class 9 Mathematics, Chapter 4, Exercise 4.1 from the new textbook prescribed by the National Book Foundation (NBF) for the AJK Board. The exercise is explained step by step in a simple and clear way to help students understand the concepts and prepare well for exams. This lecture is useful for Class 9 AJK Board students studying Mathematics from the NBF textbook. This video is uploaded by ZFS School. Keywords / Topics Covered: Class 9 Exercise 4.1 NBF Maths Maths Exercise 4.1 Class 9 AJK Board Class 9 Math Unit 4 Exercise 4.1 Ex 4.1 Math 9 AJK Board National Book Foundation Maths Class 9