Plus and Subtraction

To add a negative plus a positive, or a positive plus a negative---what is the rule?

• subtract and always put a negative sign

• subtract and take the sign of the larger number

• add and take the sign of the biggest number

• just subtract

If you have at least one negative integer in a subtraction problem, what do you do?

• subtract it

• change the subtraction sign into an addition sign and add.

• change the subtraction sign into an addition sign and change the sign of the second number, then follow integer addition rules.

• change the subtraction sign into and addition sign and change the sign of the first number.

-13 + (-2)

• -15

• -11

• 15

• 11

-22 + 6

• -28

• 16

• -16

• 28

-30 - 10

• 40

• -40

• -20

• 20

How do you solve this problem. -6 - (-4). What is the answer?

• subtract it, -10

• change to addition and add. -10

• subtract it, -2

• You change to addition, and change the sign of the second number. Follow integer addition rules. -2

What rule do you use to solve this problem? -6 + 11, then solve the problem

• a negative plus a positive, you subtract and take the sign of the larger number. The answer is 5.

• a negative plus a negative is a bigger negative. The answer is 5

-7 + (-3) + 4

• -8

• 8

• -14

• -6

11 - (-2)

• 13

• 9

• -13

• -9

To add a negative plus a negative, What is the rule?

• subtract and put a negative sign

• add and make it positive

• a negative plus a negative is a bigger negative---add and put a negative sign