Mastering Substitution
Mathematics
Grade 8
1 questions
~2 mins
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About This Worksheet
A worksheet covering Substitution for Grade 8 students.
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Mastering Substitution
Subject: MathematicsGrade: Grade 8
Name:
Date:
Untitled Worksheet
Grade Grade 8
A
Introduction
Read the key concept carefully before attempting the questions.
1.
Substitution in algebra involves replacing a variable with a specific value to evaluate an expression. For example, if x = 3, then 2x + 5 = ?
[2 marks]B
Practice Questions
Answer all questions. Show your working in the grid spaces provided.
1.
If y = 4, evaluate the expression 3y + 7.
[2 marks]2.
Given z = 5, find the value of 2z - 3.
[2 marks]3.
Calculate the value of 4a + 2 when a = 3.
[2 marks]4.
Evaluate the expression 5b - 4 when b = 6.
[2 marks]5.
If x = 2, find the value of 3x² + 4.
[3 marks]6.
Given y = 7, evaluate 2y + y².
[3 marks]7.
Calculate the value of 6z - z² when z = 3.
[3 marks]8.
Find the value of 2a + 3b when a=4 and b=5.
[4 marks]9.
A rectangle's length is represented by 2x + 3, and width by x + 4. If x = 5, what is the area?
[4 marks]10.
A car travels at a speed of 60 km/h for x hours. If x = 4, how far does the car travel? Express your answer as a calculation.
[4 marks]Quick Actions
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Details
- Created
- 12/30/2025
- Updated
- 12/30/2025
- Type
- worksheet