1/7*(23/5-1/2) eching

$$\frac { 1 } { 7 } \times ( 2 \frac { 3 } { 5 } - \frac { 1 } { 2 } )$$

Baholash

$$\frac{3}{10}=0,3$$

Yechim qadamlari

10 hosil qilish uchun 2 va 5 ni ko'paytirish.

$$\frac{1}{7}\left(\frac{10+3}{5}-\frac{1}{2}\right)$$

13 olish uchun 10 va 3'ni qo'shing.

$$\frac{1}{7}\left(\frac{13}{5}-\frac{1}{2}\right)$$

5 va 2 ning eng kichik umumiy karralisi 10 ga teng. \frac{13}{5} va \frac{1}{2} ni 10 maxraj bilan kasrlarga aylantirib oling.

$$\frac{1}{7}\left(\frac{26}{10}-\frac{5}{10}\right)$$

\frac{26}{10} va \frac{5}{10} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{1}{7}\times \frac{26-5}{10}$$

21 olish uchun 26 dan 5 ni ayirish.

$$\frac{1}{7}\times \frac{21}{10}$$

Suratni maxrajga va maxrajini suratga ko‘paytirish orqali \frac{1}{7} ni \frac{21}{10} ga ko‘paytiring.

$$\frac{1\times 21}{7\times 10}$$

\frac{1\times 21}{7\times 10} kasridagi ko‘paytirishlarni bajaring.

$$\frac{21}{70}$$

\frac{21}{70} ulushini 7 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$\frac{3}{10}$$

Omil

$$\frac{3}{2 \cdot 5} = 0,3$$