Substitution into Algebraic Expressions
Instructions: Substitute the given values into each expression and calculate the answer. Show your working.
Section A: Single Variable
If x = 5, find the value of:
1. 3x + 7
Answer: ________________
2. 2x - 4
Answer: ________________
3. x² + 6
Answer: ________________
4. 20 - x
Answer: ________________
5. 4x ÷ 2
Answer: ________________
6. x² - 2x
Answer: ________________
Section B: Two Variables
If a = 3 and b = 4, find the value of:
7. a + b
Answer: ________________
8. 5a - b
Answer: ________________
9. ab
Answer: ________________
10. 2a + 3b
Answer: ________________
11. a² + b²
Answer: ________________
12. b² - a
Answer: ________________
Section C: Mixed Challenge
If m = 6, n = 2, and p = 10, find the value of:
13. m + n + p
Answer: ________________
14. p - m + n
Answer: ________________
15. 3m - 2n
Answer: ________________
16. mn + p
Answer: ________________
17. (m + n)p
Answer: ________________
18. m² ÷ n
Answer: ________________