Integer Rules 2

In Addition if the signs the are the same we....

• Add

• Subtract

• Keep Common Sign

• Take sign of number with greater absolute value

In addition if the signs are different

• add

• subtract

• the sum is always positive

• the sum is always negative

• take sign of number with greater absolute value

In multiplication both factors are positive

• always positive

• always negative

In multiplication if both numbers are negative

• always positive

• always negative

What do you get when you multiply a negative by a positive?

• Positive
• Negative

What do you get when you multiply a negative by a negative?

• Positive
• Negative 

7 x (-6)

• 13

• -13

• 42

• -42

-4 - (-8)

• -12

• -4

• 4

• 12

-7 + -4

• -11
• -3
• 3
• 11

-6(-8)

• 48
• 14
• -48
• -14