Math Integers

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Adding Integers

When using the same signs add the absolute values and use the common sign ex. 3+5=8 or -3+(-5)=-8 When using different signs subtract the lesser absolute value from the greater absolute value. Then use the sign with the number with the greater absolute value. ex-7+10=-8.

Subtracting Integers

To subtract an integer add its opposite. 4-7= 4+(-7) = -3

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

Add the opposites by changing the - sign to + like 7 - (-3) =

7 + 3= 10

Multiplying Integers

The product of two positive integers is positive 3(5)=15

The product of two negative integer is positive -4(-6)=24

The product of a positive integer and a negative integer is negative 2(-8)=-16

Dividing Integers

Same signs - the quotient of two integers with the same sign is positive 15÷3=5

Different signs- the quotient of two integers with different signs is negative 12÷ -4=3

Zero- the quotient of zero and any nonzero integer is zero 0÷13=0