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\frac{2}{7}-\frac{1}{2}\times \frac{2}{7}-\left(\frac{1}{2}-\frac{3}{4}\right)
\frac{4}{14} ulushini 2 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.
\frac{2}{7}-\frac{1\times 2}{2\times 7}-\left(\frac{1}{2}-\frac{3}{4}\right)
Suratni maxrajga va maxrajini suratga ko‘paytirish orqali \frac{1}{2} ni \frac{2}{7} ga ko‘paytiring.
\frac{2}{7}-\frac{1}{7}-\left(\frac{1}{2}-\frac{3}{4}\right)
Surat va maxrajdagi ikkala 2 ni qisqartiring.
\frac{2-1}{7}-\left(\frac{1}{2}-\frac{3}{4}\right)
\frac{2}{7} va \frac{1}{7} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.
\frac{1}{7}-\left(\frac{1}{2}-\frac{3}{4}\right)
1 olish uchun 2 dan 1 ni ayirish.
\frac{1}{7}-\left(\frac{2}{4}-\frac{3}{4}\right)
2 va 4 ning eng kichik umumiy karralisi 4 ga teng. \frac{1}{2} va \frac{3}{4} ni 4 maxraj bilan kasrlarga aylantirib oling.
\frac{1}{7}-\frac{2-3}{4}
\frac{2}{4} va \frac{3}{4} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.
\frac{1}{7}-\left(-\frac{1}{4}\right)
-1 olish uchun 2 dan 3 ni ayirish.
\frac{1}{7}+\frac{1}{4}
-\frac{1}{4} ning teskarisi \frac{1}{4} ga teng.
\frac{4}{28}+\frac{7}{28}
7 va 4 ning eng kichik umumiy karralisi 28 ga teng. \frac{1}{7} va \frac{1}{4} ni 28 maxraj bilan kasrlarga aylantirib oling.
\frac{4+7}{28}
\frac{4}{28} va \frac{7}{28} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.
\frac{11}{28}
11 olish uchun 4 va 7'ni qo'shing.