945

9 4 5

8 5 3

7 6 1

5 – 2 =

3 4 – 2 =

2 6 – 3 =

3

2 – 2 =

0 4 – 1 =

3 6 – 4 =

2

4 4

111

342

4 – 1 =

3

4 – 3 =

1

6 – 2=

4

6 – 4 =

2

7 – 4=

3

7– 3 =

4