Rules in Multiplying Integers
1. When you multiply two numbers with the same sign, the product is positive.
(+)(+) = (+)
(-)(-) = (-)
2. When you multiply two numbers with different signs, the product is negative.
(+)(-) = (-)
(-)(+) = (-)
Rules in Dividing Integers
1. When two numbers with the same sign are divided, the quotient is always positive.
2. When two numbers with different signs ate divided, the quotient is always negative
3. The rules for dividing zero by a nonzero number and for division by zero still hold.