1 i 2/7+1/4=1 i 8/28+7/28=1 i 15/28
1²/₇+¼=-slrowadzamy do wspólnego mianownika-28
1⁸/₂₈+⁷/₂₈=
1¹⁵/₂₈
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1 i 2/7+1/4=1 i 8/28+7/28=1 i 15/28
1²/₇+¼=-slrowadzamy do wspólnego mianownika-28
1⁸/₂₈+⁷/₂₈=
1¹⁵/₂₈