L2 Addition and Subtraction of directed numbers

What is the result of (+2) + (+9)?

• +11

• +7

• +12

• +9

What is the result of (-6) + (-3)?

• -9

• -3

• -6

• +3

What is the result of (+6) - (+8)?

• -2

• +2

• +14

• -14

What is the result of (-13) - (-2)?

• -11

• -15

• +11

• +15

What is the result of (+17) + (-4)?

• +13

• +21

• -13

• -21

What is the result of (+9) + (-8)?

• +1

• -1

• +17

• -17

What is the result of (-6) - (+5)?

• -11

• +11

• -1

• +1

What is the result of (+5) - (-13)?

• +18

• -18

• +8

• -8

What is the result of (-3) - (+17)?

• -20

• +20

• -14

• +14

What is the result of (-5) - (-6)?

• +1

• -1

• +11

• -11