# Question: List down the rules for adding, subtracting, multiplying and dividing positive and negative numbers.

The four basic arithmetic operations associated with integers are:

- Addition of Integers
- Subtraction of Integer
- Multiplication of Integers
- Division of Integers

## Answer: There are some rules for adding subtracting multiplying and dividing positive and negative numbers.

Before we start learning these methods of integer operations, we need to remember a few things. If there is no sign in front of a number, it means that the number is positive.

## Explanation:

Below are the rules listed for adding subtracting multiplying and dividing positive and negative numbers

### Adding Integers Rule:

Case 1: Signs are same

If the signs are the same, add and keep the same sign.

- (+) + (+) = add the numbers and the answer is positive

Example : 2 + 5 = 7

- (‐) + (‐) = add the numbers and the answer is negative

Example : (-5) + (-4) = -9

Case 2: Signs are different

If the signs are different, subtract the numbers and use the sign of the larger number

- (+) + (‐) = subtract the numbers and take the sign of the bigger number

Example: 7 + (-3) = 4

- (‐) + (+) = subtract the numbers and take the sign of the bigger number

Example: (-9) + 6 = -3

### Subtracting Integers Rule:

To subtract a number from another number, the sign of the number (which is to be subtracted) should be changed and then this number with the changed sign, should be added to the first number.

- (+) - (+) = Change the sign of the number to be subtracted and add them up.The result takes the sign of the greater number

Example: (+6) – (+2)

= (+6) + (-2) = 6 - 2 = 4

- (-) - (-) = Change the sign of the number to be subtracted and add them up.The result takes the sign of the greater number

Example: (-9) – (-6)

= (-9) + (+6) = -9 + 6 = -3

- (+) - (-) = Change the sign of the number to be subtracted and add them up. Result is always positive

Example: (+5) – (-3)

= (+5) +(+3) = 5 + 3 = 8

- (-) - (+) = Change the sign of the number to be subtracted and add them up. Result is always negative

Example: (-7) – (+2)

= (-7) + (-2) = -7 - 2 = -9

### Multiplying and Dividing Integers Rule:

Case 1: Signs are same

If the signs are the same, multiply or divide and the answer is always positive.

- (+) × (+) = +

Example: 5 × 4 = 20

- (+) ÷ (+) = +

Example: 16 ÷ 4 = 4

- (‐) × (‐) = +

Example: (-7) × (-9) = 63

- (‐) ÷ (‐) = +

Example: (-20) ÷ (-2) = 10

Case 2: Signs are different

If the signs are different, multiply or divide, the answer is always negative.

- (+) × (‐) = ‐

Example: 6 × (-10) = -60

- (+) ÷ (‐) = ‐

Example: 30 ÷ (-15) = -2

- (‐) × (+) = ‐

Example: -3 × 11 = 33

- (‐) ÷ (+) = ‐

Example: -25 ÷ 5 = -5