NCERT Class 7 Maths Part 2 Chapter 7 Finding the Unknown Extra Questions with Answers
NCERT Class 7 Maths Part 2 Chapter 7 Finding the Unknown Extra Questions with Answers Class 7 Maths Part 2 Chapter 7 Extra Questions with Answers Q1. What is a variable? Answer: A variable is a letter used to represent an unknown value. Q2. Solve: x + 8 = 15 Answer: x = 7 Q3. Solve: y − 9 = 12 Answer: y = 21 Q4. Solve: 5a = 40 Answer: a = 8 Q5. Solve: b ÷ 6 = 9 Answer: b = 54 Q6. Solve: 3x + 4 = 19 Answer: x = 5 Q7. Solve: 2m − 8 = 18 Answer: m = 13 Q8. Solve: 7p = 63 Answer: p = 9 Q9. Solve: n/5 = 11 Answer: n = 55 Q10. What is the first step in solving a linear equation? Answer: Isolate the variable by performing inverse operations. Q11. Which operation is the inverse of addition? Answer: Subtraction. Q12. Which operation is the inverse of multiplication? Answer: Division. Q13. Check the solution of x = 6 for x + 9 = 15. Is it correct? Answer: Yes, because 6 + 9 = 15. Q14. Why do we use equations in mathematics? Answer: Equations help us find unknown values and solve re...