Add/Subtract and Multiply/Divide Integers

subtracting integers (rule)

• subtract their absolute value; keep the sign of the integer with the higher absolute value

• add their absolute value and keep the sign of the integers

• change subtraction sign (between the integers) to an addition sign and change the sign of the integer following it to its opposite (if it was positive, make it negative; if it was negative, make it positive); then solve

adding integers with DIFFERENT signs

• subtract their absolute value; keep the sign of the integer with the higher absolute value

• add their absolute value and keep the sign of the integers

• change subtraction sign (between the integers) to an addition sign and change the sign of the integer following it to its opposite (if it was positive, make it negative; if it was negative, make it positive); then solve

adding integers with the SAME sign

• add their absolute value and keep the sign of the integers

• subtract their absolute value; keep the sign of the integer with the higher absolute value

• change subtraction sign (between the integers) to an addition sign and change the sign of the integer following it to its opposite (if it was positive, make it negative; if it was negative, make it positive); then solve

When multiplying or dividing a NEGATIVE and NEGATIVE number your result will be...

• POSITIVE

• NEGATIVE

• DEPENDS ON WHICH NUMBER IS LARGER.

When multiplying or dividing a NEGATIVE and POSITIVE number your result will be...

• Positive

• Negative

• Depends on which is bigger.

(-12) + 7

• 5

• -5

• 19

• -19

(-10) + (-7)

• -17

• 17

• 3

• -3

-6 + 12

• -18

• 6

• -6

• NONE OF THESE

Which integer is the opposite of -8?

• 8

• -8

• 81

-13 - (-5)

• 18

• -18

• 8

• -8