Class 6 · Chapter 2

Whole Numbers

Predecessor, successor; representation on a number line; properties of addition, subtraction, multiplication and division.

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Detailed theory

Natural numbers:

1, 2, 3, \ldots

. Adding

0

gives whole numbers:

0, 1, 2, 3, \ldots

. Every natural number is a whole number but

0

is not natural.

Key concepts & formulas

Whole numbers =

0, 1, 2, 3, \ldots

0

is the additive identity;

1

is the multiplicative identity.

Division by

0

is not defined.

Whole numbers are closed under addition and multiplication.

Distributive law:

a(b+c) = ab + ac