Adding Negative Numbers

Front 1

-2-7

Back 1

-9

Front 2

-6+9

Back 2

3

Front 3

-14-(-3)

Back 3

-11

Front 4

3-9

Back 4

-6

Front 5

-5-5

Back 5

-10

Front 6

-6 + (-2)

Back 6

-8

Front 7

-3 - (-3)

Back 7

0

Front 8

-(-3) + 7

Back 8

10

Front 9

18 - 21

Back 9

-3

Front 10

65 - 77

Back 10

-12

Front 11

-(-4) - (-6)

Back 11

10

Front 12

0 - 7

Back 12

-7

Front 13

-8 - 6

Back 13

-14

Front 14

3 - (-4)

Back 14

7

Front 15

18 - 19

Back 15

-1