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1 1/6 - 7/9 = 7/6 - 7/9 = 21/18 - 14/18 = 7/18
2 3/8 - 1 5/6 = 19/8 - 11/6 = 57/24 - 44/24 = 13/24
1.1/6-7/9=7/18
2.3/8-1.5/6=13/24
Musisz sprowadzić do wspólnego mianownika we wszystkich przykładach. ;)