NCERT Class 7 Maths Chapter 4 Expressions using Letter Numbers Worksheet with Answers

Class 7 Maths Chapter 4 Worksheet

Fill in the Blanks

1. A letter used to represent an unknown number is called a __________.
Answer: Variable

2. In the expression 7x + 5, x is the __________.
Answer: Variable

3. In the expression 8a − 4, −4 is the __________ term.
Answer: Constant

4. The coefficient of y in 9y is __________.
Answer: 9

5. The expression 5m + 3m simplifies to __________.
Answer: 8m

Write True or False

6. Variables are represented by letters.
Answer: True

7. An algebraic expression always contains only numbers.
Answer: False

8. Like terms can be added or subtracted.
Answer: True

9. The coefficient of x in x is 1.
Answer: True

10. Constants change their values.
Answer: False

Short Answer Questions

11. Evaluate 5x + 2 when x = 6.
Answer: 32

12. Evaluate 3a − 4 when a = 8.
Answer: 20

13. Simplify 7m + 5m.
Answer: 12m

14. Write an algebraic expression for "a number increased by 15."
Answer: x + 15

15. Write an algebraic expression for "eight times a number."
Answer: 8x