Сложение и вычитание

Front

2+2

Back

4

Front

5-3

Back

2

Front

5+5

Back

10

Front

9-4

Back

5

Front

8-2

Back

6

Front

7-6

Back

1

Front

3+4

Back

7

Front

2+6

Back

8

Front

9-9

Back

0

Front

1+3

Back

4