10% of 60 =
                   ( 6 )

80% of 20 =
                   (       )

90% of 60 =
                   (       )

30% of 40 =
                   (       )

80% of 50 =
                   (       )

90% of 40 =
                   (       )

10% of 80 =
                   (       )

50% of 40 =
                   (       )

90% of 60 =
                   (       )

          +[         ]

7% of 20 =
                   ( 1.4 )

3% of 60 =
                   (       )

2% of 50 =
                   (       )

80% of 7 =
                   (       )

10% of 7 =
                   (       )

80% of 8 =
                   (       )

40% of 1 =
                   (       )

9% of 10 =
                   (       )

70% of 3 =
                   (       )

          +[         ]

90% of 7 =
                   ( 6.3 )

1% of 60 =
                   (       )

70% of 9 =
                   (       )

30% of 8 =
                   (       )

10% of 2 =
                   (       )

70% of 7 =
                   (       )

5% of 50 =
                   (       )

30% of 3 =
                   (       )

50% of 6 =
                   (       )

          +[         ]

       ++[[            ]]