30% of 10 =
                   ( 3 )

10% of 50 =
                   (       )

20% of 90 =
                   (       )

20% of 60 =
                   (       )

10% of 80 =
                   (       )

70% of 60 =
                   (       )

80% of 20 =
                   (       )

70% of 70 =
                   (       )

30% of 10 =
                   (       )

          +[         ]

1% of 40 =
                   ( 0.4 )

10% of 9 =
                   (       )

40% of 8 =
                   (       )

10% of 2 =
                   (       )

80% of 9 =
                   (       )

60% of 3 =
                   (       )

30% of 3 =
                   (       )

3% of 50 =
                   (       )

9% of 70 =
                   (       )

          +[         ]

20% of 1 =
                   ( 0.2 )

80% of 8 =
                   (       )

9% of 30 =
                   (       )

5% of 20 =
                   (       )

8% of 50 =
                   (       )

50% of 2 =
                   (       )

3% of 80 =
                   (       )

10% of 6 =
                   (       )

3% of 10 =
                   (       )

          +[         ]

       ++[[            ]]