22/5*1/4-3/8 eching

$$2 \frac { 2 } { 5 } \times \frac { 1 } { 4 } - \frac { 3 } { 8 }$$

Baholash

$$\frac{9}{40}=0,225$$

Yechim qadamlari

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

$$\frac{10+2}{5}\times \frac{1}{4}-\frac{3}{8}$$

12 olish uchun 10 va 2'ni qo'shing.

$$\frac{12}{5}\times \frac{1}{4}-\frac{3}{8}$$

Suratni maxrajga va maxrajini suratga ko‘paytirish orqali \frac{12}{5} ni \frac{1}{4} ga ko‘paytiring.

$$\frac{12\times 1}{5\times 4}-\frac{3}{8}$$

\frac{12\times 1}{5\times 4} kasridagi ko‘paytirishlarni bajaring.

$$\frac{12}{20}-\frac{3}{8}$$

\frac{12}{20} ulushini 4 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$\frac{3}{5}-\frac{3}{8}$$

5 va 8 ning eng kichik umumiy karralisi 40 ga teng. \frac{3}{5} va \frac{3}{8} ni 40 maxraj bilan kasrlarga aylantirib oling.

$$\frac{24}{40}-\frac{15}{40}$$

\frac{24}{40} va \frac{15}{40} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{24-15}{40}$$

9 olish uchun 24 dan 15 ni ayirish.

$$\frac{9}{40}$$

Omil

$$\frac{3 ^ {2}}{2 ^ {3} \cdot 5} = 0,225$$