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 = 9.
Answer: n = 45

15. What is meant by the solution of an equation?
Answer: The solution of an equation is the value of the variable that makes both sides of the equation equal.