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b)3 * 2 8/9 = 3 * 26/9 = 78/9 = 8 6/9 osiem calosci i 6/9
c) 2 3/15 * 5 = 33/15 * 5 = 165/15 = 11 jedenascie calosci
d) 6 5/9*3 = 59/9 * 3 =177/9 = 19 6/9 dziewietnascie calosci i 6/9