Learn Working with Numbers: Everyday Math | Everyday Calculations and Automation

Understanding how to perform calculations is essential for using Python in your daily life. Python's arithmetic operators let you easily handle tasks like adding up shopping totals, working out budgets, or figuring out discounts. The main arithmetic operators you will use are:

Addition (+): adds two numbers;
Subtraction (-): subtracts one number from another;
Multiplication (*): multiplies two numbers;
Division (/): divides one number by another;
Parentheses (()): control the order of operations, just like in standard math.

You can combine these operators to solve everyday math problems quickly and accurately.


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# Basic arithmetic operations
total = 20 + 15      # Addition
difference = 20 - 5  # Subtraction
product = 4 * 6      # Multiplication
quotient = 18 / 3    # Division

# Using parentheses to control order of operations
result = (2 + 3) * 4  # Parentheses change the order

print("Total:", total)
print("Difference:", difference)
print("Product:", product)
print("Quotient:", quotient)
print("Result with parentheses:", result)

When you work with numbers in Python, you will encounter two main types: integers (whole numbers like 5 or -2) and floats (numbers with a decimal point, like 3.14 or -0.5). It's important to be aware of these types because certain operations, especially division, can produce different results depending on the input. For example, dividing two integers with / will always result in a float, even if the result is a whole number. This can affect how your results look and how you use them in further calculations.


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# Calculate a grocery bill with tax and a discount
subtotal = 50.00  # base price of groceries
tax_rate = 0.07   # 7% tax
discount = 5.00   # $5 discount

tax = subtotal * tax_rate
total_before_discount = subtotal + tax
final_total = total_before_discount - discount

print("Subtotal:", subtotal)
print("Tax:", tax)
print("Total before discount:", total_before_discount)
print("Final total after discount:", final_total)

1. Which operator would you use to find the remainder of a division in Python?

2. What is the difference between an integer and a float in Python?

3. Fill in the blanks to complete a calculation for a discounted price.

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Section 1. Chapter 1

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Addition (+): adds two numbers;
Subtraction (-): subtracts one number from another;
Multiplication (*): multiplies two numbers;
Division (/): divides one number by another;
Parentheses (()): control the order of operations, just like in standard math.