1 + 2 =

(a)  

1 + 3 =

(a)  

1 + 4 =

(a)  

2 + 1 =

(a)  

2 + 2 =

(a)  

2 + 3 =

(a)  

3 + 1 =

(a)  

3 + 2 =

(a)  

4 + 1 =

(a)  

1 - 1 =

(a)  

2 - 1 =

(a)  

2 - 2 =

(a)  

3 - 1 =

(a)  

3 - 2 =

(a)  

3 - 3 =

(a)  

4 - 1 =

(a)  

4 - 2 =

(a)  

4 - 3 =

(a)  

4 - 4 =

(a)  

5 - 1 =

(a)  

5 - 2 =

(a)  

5 - 3 =

(a)  

5 - 4 =

(a)  

5 - 5 =

(a)  

1 + 5 =

(a)  

1 + 6 =

(a)  

2 + 4 =

(a)  

2 + 5 =

(a)  

3 + 3 =

(a)  

3 + 4 =

(a)  

4 + 2 =

(a)  

4 + 3 =

(a)  

5 + 1 =

(a)  

5 + 2 =

(a)  

6 + 1 =

(a)  

6 - 1 =

(a)  

6 - 2 =

(a)  

6 - 3 =

(a)  

6 - 4 =

(a)  

6 - 5 =

(a)  

6 - 6 =

(a)  

5 - 5 =

(a)  

4 - 4 =

(a)  

3 - 3 =

(a)  

2 - 2 =

(a)  

1 - 1 =

(a)  

0 - 0 =

(a)  

0 + 0 =

(a)  

7 - 1 =

(a)  

7 - 2 =

(a)  

7 - 3 =

(a)  

7 - 4 =

(a)  

7 - 5 =

(a)  

7 - 6 =

(a)  

7 - 7 =

(a)