## Class 7 - Mathematics - Properties of Integers

1. Closure Property Under Addition

Integers are closed under addition, i.e. for any two integers,a and b, a+b is an integer.

eg: 3 + 4 = 7

-9 + 7 = 2

2. Closure Property under Subtraction:

Integers are closed under subtraction, i.e. for any two integers,a and b, a-b is an integer.

eg:

-21 -(-9) = -12

8 -3 = 5

3. Closure Property under Multiplication:

Integers are closed under multiplication, i.e. for any two integers,a and b, ab is an integer.

e.g.

5 × 6 = 30

-3 × -8 = 24

-3 × 7 = -21