20% of 50 =
                   ( 10 )

90% of 90 =
                   (       )

10% of 70 =
                   (       )

50% of 10 =
                   (       )

10% of 40 =
                   (       )

20% of 10 =
                   (       )

30% of 50 =
                   (       )

70% of 30 =
                   (       )

20% of 50 =
                   (       )

          +[         ]

9% of 80 =
                   ( 7.2 )

50% of 6 =
                   (       )

30% of 4 =
                   (       )

10% of 6 =
                   (       )

30% of 4 =
                   (       )

10% of 7 =
                   (       )

60% of 8 =
                   (       )

1% of 10 =
                   (       )

80% of 1 =
                   (       )

          +[         ]

1% of 50 =
                   ( 0.5 )

3% of 40 =
                   (       )

90% of 7 =
                   (       )

4% of 70 =
                   (       )

20% of 1 =
                   (       )

9% of 50 =
                   (       )

6% of 50 =
                   (       )

40% of 2 =
                   (       )

60% of 6 =
                   (       )

          +[         ]

       ++[[            ]]