Multiplication Integer Rules

In multiplication if both numbers are negative

• always positive

• always negative

In multiplication the answer is positive if there is

• one negative sign

• two negative signs

• three negative signs

• four negative signs

• zero negative signs

In multiplication the answer is negative if

• one negative sign

• two negative signs

• three negative signs

• four negative signs

• zero negative signs

In multiplication and division the sign is always determine by

• the largest number

• the most negative or positive numbers

• If an odd or even amount of positive numbers

• If an odd or even number of negative numbers

Evaluate xy if x = -2 and y = -13.

1. Since the 2 integers have ​ (a)   , 

2. The product will be ​ (b)  

3. xy =​ (c)  

• Same Signs

• Positive

• 26

• Different Signs

• Negative

• -26

Evaluate xy if x = -2 and y = -13.

• Same Signs

• Positive

• 26

• Different Signs

• Negative

• -26

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

• Positive

• Negative

• Depends on which is bigger.

Evaluate xy if x = -2 and y = -13.

• Same Signs

• Positive

• 26

• Different Signs

• Negative

• -26

In multiplication the sign is determined by

• the large number

• same signs

• different signs

• 1st number

• how many negative signs

pos. * neg. =

• pos.

• neg.