Introduction

Whole Numbers

Whole numbers include all-natural numbers and zero

 i.e., 0, 1, 2, 3, 4, and so on.

Negative Numbers

  • The numbers lying to the left of the zero with negative sign on the numbers line are called negative numbers.

The Number Line

Integers

  • Set of all positive and negative numbers including zero are called integers.

…, – 4, – 3, – 2, – 1, 0, 1, 2, 3, 4, … are integers.

Representing Integers on the Number Line

Absolute value of an integer

  • When we consider only the numerical value of the integer without considering its sign it is called as the absolute value of an integer.
  • Example: Absolute value of -7 is 7 and of +7 is 7.

Ordering Integers

  • The number increases as we move towards right and decreases as we move towards left on a number line.
  • Hence, the order of integers is …, –5, –4, – 3, – 2, – 1, 0, 1, 2, 3, 4, 5…

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