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\frac{9}{12}+\frac{10}{12}-\frac{15}{12}
4 va 6 ning eng kichik umumiy karralisi 12 ga teng. \frac{3}{4} va \frac{5}{6} ni 12 maxraj bilan kasrlarga aylantirib oling.
\frac{9+10}{12}-\frac{15}{12}
\frac{9}{12} va \frac{10}{12} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.
\frac{19}{12}-\frac{15}{12}
19 olish uchun 9 va 10'ni qo'shing.
\frac{19-15}{12}
\frac{19}{12} va \frac{15}{12} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.
\frac{4}{12}
4 olish uchun 19 dan 15 ni ayirish.
\frac{1}{3}
\frac{4}{12} ulushini 4 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.