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I I
skróć 2 i 2 przez 2
skróć 10 i 5 przez 5
1 3/4 + 2/10 : 2/5=
1 3/4 + 1/5 * 5/2=
1 3/4 + 1/2=
1 3/4 + 2/4=
1 5/4 =
2 1/4