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1i1/2 + 1i1/2 + 2/5 + 2/5 + 9/10 + 9/10 =
= 15/10 + 15/10 + 4/10 + 4/10 + 9/10 + 9/10 = 56/10, czyli 5 i 6/10 = 5 i 4/5
Wynik- 5 i 4/5
Myślę, że pomogłam.