2/5-1/4/frac{2{5}+1/4} eching

$$\frac{ \frac{ 2 }{ 5 } - \frac{ 1 }{ 4 } }{ \frac{ 2 }{ 5 } + \frac{ 1 }{ 4 } }$$

Baholash

$$\frac{3}{13}\approx 0,230769231$$

Yechim qadamlari

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

$$\frac{\frac{8}{20}-\frac{5}{20}}{\frac{2}{5}+\frac{1}{4}}$$

\frac{8}{20} va \frac{5}{20} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{\frac{8-5}{20}}{\frac{2}{5}+\frac{1}{4}}$$

3 olish uchun 8 dan 5 ni ayirish.

$$\frac{\frac{3}{20}}{\frac{2}{5}+\frac{1}{4}}$$

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

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

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

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

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

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

\frac{3}{20} ni \frac{13}{20} ga bo'lish \frac{3}{20} ga k'paytirish \frac{13}{20} ga qaytarish.

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

Suratni maxrajga va maxrajini suratga ko‘paytirish orqali \frac{3}{20} ni \frac{20}{13} ga ko‘paytiring.

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

Surat va maxrajdagi ikkala 20 ni qisqartiring.

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

Omil

$$\frac{3}{13} = 0,23076923076923078$$