Addition

Addition

7+1=

To solve - 9 + (- 2), what would you do?

• Same sign add, and get -11.

• Different signs subtract, and get 7.

• Different signs subtract, and get - 7.

To solve 9 + ( -2), you would:

• Same signs, add to get 11.

• Different signs subtract, and get 7.

• Different signs subtract and get -7.

-20 + (-11)

• 31
• 9
• -9
• -31

-12 + 9

• 21
• 3
• -3
• -21

-10 + 4

• -14
• 14
• -6
• 6