Условие:

6027
607
6720
8350
8053
803
(8020) − 9
100 − (4 + 36)
90 − (5350)

6027 = 60 − (20 + 7) = (6020) − 7 = 407 = 33
607 = (50 + 10) − 7 = 50 + (107) = 50 + 3 = 53
6720 = (60 + 7) − 20 = 7 + (6020) = 7 + 40 = 47
8350 = (80 + 3) − 50 = (8050) − 3 = 303 = 27
8053 = 80 − (50 + 3) = (8050) − 3 = 303 = 27
803 = (70 + 10) − 3 = 70 + (103) = 70 + 7 = 77
(8020) − 9 = 609 = 51
100 − (4 + 36) = 10040 = 60
90 − (5350) = 903 = 87