1 + 2=

(a)  

1 + 3=

(a)  

1 + 4=

(a)  

1 + 5=

(a)  

1 + 6=

(a)  

1 + 7=

(a)  

1 + 8=

(a)  

1 + 9=

(a)  

2+ 2=

(a)  

3+ 3=

(a)  

4+ 4 =

(a)  

5+ 5 =

(a)  

6 + 6 =

(a)  

7 + 7 =

(a)  

8 + 8 =

(a)  

9 + 9 =

(a)  

10 + 10 =

(a)  

2 + 1 =

(a)  

2 + 3 =

(a)  

2 + 4 =

(a)  

2 + 5 =

(a)  

2 + 6 =

(a)  

2 + 7 =

(a)  

2 + 8 =

(a)  

2 + 9 =

(a)  

3 +1 =

(a)  

3 + 2 =

(a)  

3 + 4 =

(a)  

3 + 5 =

(a)  

3 + 6 =

(a)  

3 + 7 =

(a)  

3 + 8 =

(a)  

3 + 9 =

(a)  

3 + 10 =

(a)  

4 + 1 =

(a)  

4 + 2 =

(a)  

4 + 3 =

(a)  

4 + 5 =

(a)  

4 + 6 =

(a)  

4 + 7 =

(a)  

4 + 8 =

(a)  

4 + 9 =

(a)  

4 + 10 =

(a)  

2 + 10 =

(a)  

5 + 1 =

(a)  

5 + 2 =

(a)  

5 + 3 =

(a)  

5 + 4 =

(a)  

5 + 8 =

(a)  

5 + 7 =

(a)  

5 + 9 =

(a)  

5 + 10 =

(a)  

6 + 1 =

(a)  

6 + 2 =

(a)  

6 + 3 =

(a)  

6 + 5 =

(a)  

6 + 7 =

(a)  

6 + 8 =

(a)  

6 + 9 =

(a)  

6 + 10 =

(a)  

7 + 10 =

(a)  

7 + 2 =

(a)  

7 + 3 =

(a)  

7 + 4 =

(a)  

7 + 5 =

(a)  

7 + 6 =

(a)  

7 + 8 =

(a)  

7 + 9 =

(a)  

7 + 10 =

(a)  

8 + 10 =

(a)  

8 + 2 =

(a)  

8 + 3 =

(a)  

8 + 4 =

(a)  

8 + 5

(a)  

8 + 6

(a)  

8 + 7

(a)  

8 + 9

(a)  

9 + 2

(a)  

9 + 3

(a)  

9 + 4

(a)  

9 + 5

(a)  

9 + 6

(a)  

9 + 7

(a)  

9 + 8

(a)  

9 + 10

(a)  

10-1

10-2

10-7=

10-6=

10-5=

10-4=

10-3=

10-2=

10-1=

10-0=

10-10=

9-9=

9-8=

9-7=

9-6=

9-5=

9-4=

9-3=

9-2=

9-1=

9-0=

8-8=

8-7=

8-6=

8-5=

8-4=

8-3=

8-2=

8-1=

8-0=

7-7=

7-6=

7-5=

7-4=

7-3=

7-2=

7-1=

7-0=

6-6=

6-5=

6-4=

6-3=

6-2=

6-1=

6-6=