272/39-65/13 eching

$$27 \frac { 2 } { 39 } - 6 \frac { 5 } { 13 }$$

Baholash

$$\frac{62}{3}\approx 20,666666667$$

Yechim qadamlari

1053 hosil qilish uchun 27 va 39 ni ko'paytirish.

$$\frac{1053+2}{39}-\frac{6\times 13+5}{13}$$

1055 olish uchun 1053 va 2'ni qo'shing.

$$\frac{1055}{39}-\frac{6\times 13+5}{13}$$

78 hosil qilish uchun 6 va 13 ni ko'paytirish.

$$\frac{1055}{39}-\frac{78+5}{13}$$

83 olish uchun 78 va 5'ni qo'shing.

$$\frac{1055}{39}-\frac{83}{13}$$

39 va 13 ning eng kichik umumiy karralisi 39 ga teng. \frac{1055}{39} va \frac{83}{13} ni 39 maxraj bilan kasrlarga aylantirib oling.

$$\frac{1055}{39}-\frac{249}{39}$$

\frac{1055}{39} va \frac{249}{39} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{1055-249}{39}$$

806 olish uchun 1055 dan 249 ni ayirish.

$$\frac{806}{39}$$

\frac{806}{39} ulushini 13 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$\frac{62}{3}$$

Omil

$$\frac{2 \cdot 31}{3} = 20\frac{2}{3} = 20,666666666666668$$