STUDY EDUCATION - MP Board Solutions

NCERT Class 7 Maths Part 2 Chapter 7 Finding the Unknown Worksheet with Answers Class 7 Maths Part 2 Chapter 7 Worksheet Fill in the Blanks 1. A letter used to represent an unknown number is called a __________. Answer: Variable 2. The solution of x + 8 = 15 is __________. Answer: 7 3. The solution of 5a = 40 is __________. Answer: 8 4. The inverse operation of addition is __________. Answer: Subtraction 5. The inverse operation of multiplication is __________. Answer: Division Write True or False 6. An equation always contains an equal sign (=). Answer: True 7. Variables always have a fixed value. Answer: False 8. The solution of an equation makes both sides equal. Answer: True 9. Division is the inverse operation of multiplication. Answer: True 10. Every algebraic expression is an equation. Answer: False Short Answer Questions 11. Solve: x + 12 = 25 . Answer: x = 13 12. Solve: 3y = 27 . Answer: y = 9 13. Solve: m − 8 = 14 . Answer: m = 22 14. Solve: n ÷ 5...

NCERT Class 7 Maths Part 2 Chapter 7 Finding the Unknown MCQ Questions with Answers Class 7 Maths Part 2 Chapter 7 MCQs 1. A variable is: A. A fixed number B. A letter representing an unknown value C. A mathematical operation D. A constant value Answer: B 2. Solve: x + 8 = 15 A. 5 B. 6 C. 7 D. 8 Answer: C 3. Solve: y − 9 = 12 A. 19 B. 20 C. 21 D. 22 Answer: C 4. Solve: 5a = 40 A. 6 B. 7 C. 8 D. 9 Answer: C 5. Solve: b ÷ 6 = 9 A. 45 B. 48 C. 54 D. 60 Answer: C 6. Solve: 3x + 4 = 19 A. 4 B. 5 C. 6 D. 7 Answer: B 7. Solve: 2m − 8 = 18 A. 12 B. 13 C. 14 D. 15 Answer: B 8. Solve: 7p = 63 A. 7 B. 8 C. 9 D. 10 Answer: C 9. Solve: n/5 = 11 A. 50 B. 55 C. 60 D. 65 Answer: B 10. Which operation is the inverse of addition? A. Multiplication B. Division C. Subtraction D. Squaring Answer: C 11. Which operation is the inverse of multiplication? A. Addition B. Division C. Subtraction D. Simplification Answer: B 12. Check whether x = 6 satisfies the equation x + 9 = 15. A. Yes B. No C. Cann...

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...

Finding the Unknown Class 7 Solutions Maths Ganita Prakash Part 2 Chapter 7 Page 164 – 165 Q. Find the unknown weights in the following cases: Solution: (i) Fig 7.1: Total weight = 16, Weight on either side = 8. (ii) Fig 7.2: Total weight = 24, Weight on either side = 12. (iii) Fig 7.3: Total weight = 8, Weight on either side = 4. (iv) Fig 7.4: Total weight = 18, Weight on either side = 9. (v) Fig 7.5: Total weight = 40, Weight on either side = 20. (vi) Fig 7.6: (vii) Fig 7.7: (viii) Fig 7.8: Page 165 – 166 Q. Find the unknown weight of the sack in the following cases. In Fig. 7.10, all the sacks have the same weight. [Hint: If we remove equal weights from both the plates, will the weighing scale still be balanced? Remove one sack from each plate for Fig. 7.10.] [Hint: Can you remove objects so that the sacks are only on one plate?] Solution: (i) Fig 7.9: After removing 2 kg of weight from both plates, we get 1 sack = 10 kg (ii) Fig 7.10: After removing 1 sack from both plates, we ...