Introduction

Whole numbers are numbers that do not have any fractional or decimal parts. They include all positive integers and zero.

Definition of Whole Numbers

Whole numbers are numbers that are non-negative and do not have any fractional parts. They are represented as $0, 1, 2, 3, ...$

Example

$3, 7, 11, 25$ are examples of whole numbers.

Addition of Whole Numbers

Adding whole numbers involves combining two or more whole numbers to find their total sum.

Example

Find the sum of $12 + 5$. $$ 12 + 5 = 17 $$

Subtraction of Whole Numbers

Subtracting whole numbers involves finding the difference between two whole numbers.

Example

Find the difference between $18$ and $7$. $$ 18 - 7 = 11 $$

Multiplication of Whole Numbers

Multiplying whole numbers involves repeated addition of the same number.

Example

Find the product of $4 \times 6$. $$ 4 \times 6 = 24 $$

Common Mistakes

• Confusing whole numbers with decimals or fractions.
• Forgetting to carry over when adding or subtracting larger numbers.
• Misunderstanding the concept of multiplication as repeated addition.

Key Points

• Whole numbers are non-negative integers including zero.
• Addition of whole numbers involves finding the total sum.
• Subtraction of whole numbers involves finding the difference.
• Multiplication of whole numbers is repeated addition.

Practice Questions

1. Calculate: $27 + 14$.
2. Find the difference: $45 - 18$.
3. Determine the product: $8 \times 9$.