1

3

1

3× 12 = 41

3

1

3

1

3

2

3× 12 = 81

3

1

3

1

2× 100 =

50

1

2× 58 = ?

1 ×58

2=

5 8× 1

5 8

58

2=

5 822

- 4

1 8- 1 8

9

29

5

6× 54 = ?

3

4× 120 = ?