1 + 1 = ___

___ + 1 = 2

1 + 2 = ___

___ + 2 = 3

1 + 3 = ___

___ + 3 = 4

1 + 4 = ___

___ + 4 = 5

1 + 5 = ___

___ + 5 = 6

1 + 6 = ___

1 + 7 = ___

___ + 7 = 8

1 + 8 = ___

___ + 8 = 9

1 + 9 = ___

___ + 9 = 10

1 + 10 = ___

2 + 2 = ___4

___ + 2 = 4

2 + 3 = ___

___ + 3 = 5

2 + 4 = ___

___ + 4 = 6

2 + 5 = ___

___ + 5 = 7

2 + 6 = ___

___ + 6 = 8

2 + 7 = ___

2 + 8 = ___

___ + 8 = 10

2 + 9 = ___

2 + 10 = ___

___ + 10 = 12

3 + 3 = ___

___ + 3 = 6

3 + 4 = ___ + =

___ + 4 = 7

3 + 5 = ___

___ + 5 = 8

3 + 6 = ___

___ + 6 = 9

3 + 7 = ___

___ + 7 = 10

3 + 8 = ___

___ + 8 = 11

3 + 9 = ___

___ + 9 = 12

3 + 10 = ___

___ + 10 = 13

4 + 4 = ___

___ + 4 = 8

4 + 5 = ___

___ + 5 = 9

4 + 6 = ___

___+ 6 = 10

4 + 7 = ___

___ + 7 = 11

4 + 8 = ___

___ + 8 = 12

4 + 9 = ___

___ + 9 = 13

4 + 10 = ___

___ + 10 = 14

5 + 5 = ___

___ + 5 = 10

5 + 6 = ___

___ + 6 = 11

5 + 7 = ___

___ + 7 = 12

5 + 8 = ___

___ + 8 = 13

5 + 9 = ___

5 + 10 = ___

6 + 6 = ___

___ + 6 = 12

6 + 7 = ___

___ + 7 = 13

6 + 8 = ___

___ + 8 = 14

6 + 9 = ___

___ + 9 = 15

6 + 10 = ___

7 + 7 = ___

___ + 7 = 14

7 + 8 = ___

___ + 8 = 15

7 + 9 = ___

___ + 9 = 16

7 + 10 = ___

___ + 10 = 17

8 + 8 = ___

___ + 8 = 16

8 + 9 = ___

___ + 9 = 17

8 + 10 = ___

___ + 10 = 18

9 + 9 = ___

___ + 9 = 18

9 + 10 = ___

___ + 10 = 19

10 + 10 = ___

___ + 10 = 20

___ + 7 = 9