81:20=4 (1 ост.)
99:20=4 (19 ост.)
61:30=2 (1 ост.)
89:30=2 (29 ост.)
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81:20=4 (1 ост.)
99:20=4 (19 ост.)
61:30=2 (1 ост.)
89:30=2 (29 ост.)