1/4+2/5/3= eching

$$\frac { \frac { 1 } { 4 } + \frac { 2 } { 5 } } { 3 } =$$

Baholash

$$\frac{13}{60}\approx 0,216666667$$

Yechim qadamlari

4 va 5 ning eng kichik umumiy karralisi 20 ga teng. \frac{1}{4} va \frac{2}{5} ni 20 maxraj bilan kasrlarga aylantirib oling.

$$\frac{\frac{5}{20}+\frac{8}{20}}{3}$$

\frac{5}{20} va \frac{8}{20} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.

$$\frac{\frac{5+8}{20}}{3}$$

13 olish uchun 5 va 8'ni qo'shing.

$$\frac{\frac{13}{20}}{3}$$

\frac{\frac{13}{20}}{3} ni yagona kasrga aylantiring.

$$\frac{13}{20\times 3}$$

60 hosil qilish uchun 20 va 3 ni ko'paytirish.

$$\frac{13}{60}$$

Omil

$$\frac{13}{2 ^ {2} \cdot 3 \cdot 5} = 0,21666666666666667$$