Math 6 Honors Periods 6 & 7 (Thursday)

Products With One or More Negative Factors 11-4 & 11-5

The product of a positive integer and a negative integer is a negative integer.
3 X -2 = -6
Multiplication is just repeated addition so this is really -2 + -2 + -2 = -6

The product of ZERO and any integer is always ZERO!!


4(-5X3) = 4(-15) = -60

-12(3 X 5) = -180

[25 - (6 X -2)](-3) = -111


The product of -1 and any integer equals the opposite of that integer.

-1 X 7 = -1

-1 X -8 = 8

The product of two negative integers is a positive integer

-3 X 4 X -2 = 24

-5 X 2 X -3 X -4 = -120

For a product with NO zero factors:
1. If the number of negative factors is ODD, the product is negative.

2. If the number of negative factors is EVEN, the product is positive.

-6 X -3 = 18

8 X -2 X -1 = 18

-2 X - 7 X 11 X 0 = 0

What happens in life -- happens in math:

Something good happens to someone good---- that's good

Something bad happens to someone good --- that's bad

Something good happens to someone bad--- that's bad

Something bad happens to someone bad ( really bad of course)-- that's good!!

Otherwise know as

positive X positive = positive

negative X positive = negative

positive X negative = negative

negative X negative = positive