**Rule 1: **ADDING TWO POSITIVE NUMBERS:

(+x) + (+y) = (addition of y to x)

Example: (+5) + (+3) = +8

**Rule 2: **ADDING A NEGATIVE NUMBER TO A POSITIVE NUMBER:

(+x) + (-y) = (subtraction of y from x)

Example 1: (+5) + (-3) = +2

Example 2: (+3) + (-5) = -2

**Rule 3: **ADDING A POSITIVE NUMBER TO A NEGATIVE NUMBER:

(-x) + (+y) = (subtraction of y from x)

Example 1: (-5) + (+3) = -2

Example 2: (-3) + (+5) = +2

**Rule 4: **MULTIPLYING TWO POSITIVE NUMBERS:

(+x) * (+y) = (a positive number)

Example: (+5) * (+3) = +15

**Rule 5: **MULTIPLYING TWO NEGATIVE NUMBERS:

(-x) * (-y) = (a positive number)

Example: (-5) * (-3) = +15

**Rule 6: **MULTIPLYING A NEGATIVE NUMBER with A POSITIVE NUMBER:

(+x) * (-y) = (a negative number)

Example 1: (+5) * (-3) = -15

Example 2: (+3) * (-5) = -15

**Rule 7: **SUBTRACTING A POSITIVE NUMBER FROM ANOTHER POSITIVE NUMBER:

(x) -

= (a positive number, if x > y. But answer is negative if x < y)

Example 1: (+5) - (+3) = 2

Example 2: (3) - (5) = -2

**Rule 8: **SUBTRACTING A NEGATIVE NUMBER FROM ANOTHER NEGATIVE NUMBER:

(-x) - (-y) = (a positive number)

Example 1: (-5) - (-3) = +7

Example 2: (-3) - (-5) = +7