PILNE!!! nie poradziłąm sobie chyba, coś zle mi wychodzi !!! ;/
zad.1 (85 i 7/30 (ułamek) - 83 i 5/18) : 2 i 2/3
(85⁷/₃₀-83⁵/₁₈):2⅔=(2⁶³/₂₇₀-⁷⁵/₂₇₀)׳/₈=
(1³³³/₂₇₀-⁷⁵/₂₇₀)×⅜=1²⁵⁸/₂₇₀×⅜=
1¹²⁹/₁₃₅×⅜=1⁴³/₄₅×⅜=⁸⁸/₄₅×⅜=¹¹/₁₅
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(85⁷/₃₀-83⁵/₁₈):2⅔=(2⁶³/₂₇₀-⁷⁵/₂₇₀)׳/₈=
(1³³³/₂₇₀-⁷⁵/₂₇₀)×⅜=1²⁵⁸/₂₇₀×⅜=
1¹²⁹/₁₃₅×⅜=1⁴³/₄₅×⅜=⁸⁸/₄₅×⅜=¹¹/₁₅