1) 75 - 63 2/5 = 74 5/5 - 63 2/5 = 11 3/5 (км)
2) 75 - 59 7/25 = 74 25/25 - 59 7/25 = 15 18/25 (км)
3) 11 3/5 + 15 18/25 = 11 15/25 + 15 18/25 = 26 33/25 = 27 8/25 (км)
4) 75 - 27 8/25 = 74 25/25 - 27 8/25 = 47 17/25 ( км )
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Answers & Comments
1) 75 - 63 2/5 = 74 5/5 - 63 2/5 = 11 3/5 (км)
2) 75 - 59 7/25 = 74 25/25 - 59 7/25 = 15 18/25 (км)
3) 11 3/5 + 15 18/25 = 11 15/25 + 15 18/25 = 26 33/25 = 27 8/25 (км)
4) 75 - 27 8/25 = 74 25/25 - 27 8/25 = 47 17/25 ( км )