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= 2 7/5 - 1 4/5 = 1 3/5
5-4/7= 4 7/7 - 4/7 = 4 3/7
4 5/9-2 4/9+3 2/9=
= 2 1/9 + 3 2/9 = 5 3/9 = 5 1/3
2 4/9-2/9= 2 2/9
chyba wiesz, ze jesli w ulamku licznik i mianownik sa takie same, to wartosc ulamku rowna sie 1
np
9/9 = 1
b) 5-4/7=4 i 3/7
c) =2 1/9+3 2/9=5 3/9=5 1/3
d) = 2 2/9