Integer Operations

Adding, Subtracting, Multiplying and Dividing Integers

Rules for Adding Integers

If the integers have the same sign you just add and stay with that sign.


If the integers have different signs you subtract and stay with the sign of the higher integer.


For example:

Same sign 4 + 4 = 8

Different sign -4 + 6 = 2

Same sign -1 + -1 = -2

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Rules for Subtracting Integers

If the integers have the same sign you just add and stay with that sign.


If the integers have different signs you subtract and stay with the sign of the higher integer.


For example:

Same signs 4 - 4 = 0

Different signs -8 - 6 = -14

Same sign -7 - (-3) = -4

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Rules for Multiplying Integers

If the integers have the same sign the answer is positive.


If the integers have unlike signs the answer is negative.


For example:

Same signs 5 x 5 = 25

Different signs -8 x 4 = -32

Same signs -6 x -4 =24

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Rules for Dividing Integers

If the integers have the same sign the answer is positive.


If the integers have unlike signs the answer is negative.


For example :

Same signs 10 / 2 = 5

Different signs -36 / 6 = -6

Same signs -9 / -3 = 3

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