Examples of Variable Use in Simple Python Calculations (Grade 8)

📚 Quick Study Guide

• 🧮 A variable is like a container that holds a value (e.g., a number).
• 🏷️ You assign a value to a variable using the equals sign (=). For example, `x = 5` assigns the value 5 to the variable x.
• ➕ You can perform calculations with variables, like addition, subtraction, multiplication, and division.
• ➕ Addition: `result = x + y`
• ➖ Subtraction: `result = x - y`
• ✖️ Multiplication: `result = x * y`
• ➗ Division: `result = x / y`
• 🔢 Remember the order of operations (PEMDAS/BODMAS): Parentheses/Brackets, Exponents/Orders, Multiplication and Division, Addition and Subtraction.

🧪 Practice Quiz

1. Question 1: What will be the output of the following Python code?

   x = 10
   y = 5
   print(x + y)

   A) 5 B) 10 C) 15 D) 20
2. Question 2: What will be the value of `result` after running this code?

   a = 20
   b = 4
   result = a / b

   A) 4 B) 5 C) 16 D) 24
3. Question 3: What does the following code print?

   p = 7
   q = 3
   print(p * q)

   A) 4 B) 10 C) 21 D) 24
4. Question 4: What is the output of this code?

   m = 12
   n = 8
   print(m - n)

   A) 4 B) 8 C) 12 D) 20
5. Question 5: Evaluate the following Python expression:

   x = 2
   y = 3
   z = x**y
   print(z)

   A) 5 B) 6 C) 8 D) 9
6. Question 6: If `a = 15` and `b = 6`, what will `a % b` (a modulo b) output? A) 2.5 B) 9 C) 2 D) 3
7. Question 7: What is the result of the following?

   x = 10
   y = 2
   result = (x + y) * 2
   print(result)

   A) 12 B) 20 C) 24 D) 22