Solution:

In addition, Here, (+4) + (+5)

 = +(4+5) = +9 ans.

Again, In subtraction, Here, (+9) - (+4)

 = + (5-4) = +5 ans.

Answer: The set of all the numbers both positive and negative including zero is called the set of integers.

Solution:

Here, (+5) + (-2)

 = +(5-2) = +3

Solution:

In Addition, Here, (+3) + (-7)

 = (-7) + (+3)

 = -(7-3) = -4 ans.

Again, Here, (+5) - (-3)

 = (+5) + (+3) 

 = +(5+3) = +8 ans.

The rules of multiplication of integers are:

  • The product of a positive integer and a negative integer is a negative integer.
  • The product of two negative integers or two positive integers is a positive integer.

Solution:

Here, (+3) × (+2)

 = +6 ans.

 

 

The rules of dividing the integers are: 

  • When you divide two integers with the same sign, the result is always positive.
  • When you divide two integers with different signs, the result is always negative.

Solution:

Here,  (+8) ÷ (+2)

 = (+4)