5/(2+1)-2/17-3 eching

$$\frac { 5 } { ( 2 + 1 ) } - \frac { 2 } { 17 - 3 }$$

Baholash

$$\frac{32}{21}\approx 1,523809524$$

Yechim qadamlari

3 olish uchun 2 va 1'ni qo'shing.

$$\frac{5}{3}-\frac{2}{17-3}$$

14 olish uchun 17 dan 3 ni ayirish.

$$\frac{5}{3}-\frac{2}{14}$$

\frac{2}{14} ulushini 2 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$\frac{5}{3}-\frac{1}{7}$$

3 va 7 ning eng kichik umumiy karralisi 21 ga teng. \frac{5}{3} va \frac{1}{7} ni 21 maxraj bilan kasrlarga aylantirib oling.

$$\frac{35}{21}-\frac{3}{21}$$

\frac{35}{21} va \frac{3}{21} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{35-3}{21}$$

32 olish uchun 35 dan 3 ni ayirish.

$$\frac{32}{21}$$

Omil

$$\frac{2 ^ {5}}{3 \cdot 7} = 1\frac{11}{21} = 1,5238095238095237$$