2/5+3/10-1/20/2/3+1/2+5/6 eching

$$\frac { 2 / 5 + 3 / 10 - 1 / 20 } { 2 / 3 + 1 / 2 + 5 / 6 }$$

Baholash

$$\frac{13}{40}=0,325$$

Yechim qadamlari

5 va 10 ning eng kichik umumiy karralisi 10 ga teng. \frac{2}{5} va \frac{3}{10} ni 10 maxraj bilan kasrlarga aylantirib oling.

$$\frac{\frac{4}{10}+\frac{3}{10}-\frac{1}{20}}{\frac{2}{3}+\frac{1}{2}+\frac{5}{6}}$$

\frac{4}{10} va \frac{3}{10} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.

$$\frac{\frac{4+3}{10}-\frac{1}{20}}{\frac{2}{3}+\frac{1}{2}+\frac{5}{6}}$$

7 olish uchun 4 va 3'ni qo'shing.

$$\frac{\frac{7}{10}-\frac{1}{20}}{\frac{2}{3}+\frac{1}{2}+\frac{5}{6}}$$

10 va 20 ning eng kichik umumiy karralisi 20 ga teng. \frac{7}{10} va \frac{1}{20} ni 20 maxraj bilan kasrlarga aylantirib oling.

$$\frac{\frac{14}{20}-\frac{1}{20}}{\frac{2}{3}+\frac{1}{2}+\frac{5}{6}}$$

\frac{14}{20} va \frac{1}{20} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{\frac{14-1}{20}}{\frac{2}{3}+\frac{1}{2}+\frac{5}{6}}$$

13 olish uchun 14 dan 1 ni ayirish.

$$\frac{\frac{13}{20}}{\frac{2}{3}+\frac{1}{2}+\frac{5}{6}}$$

3 va 2 ning eng kichik umumiy karralisi 6 ga teng. \frac{2}{3} va \frac{1}{2} ni 6 maxraj bilan kasrlarga aylantirib oling.

$$\frac{\frac{13}{20}}{\frac{4}{6}+\frac{3}{6}+\frac{5}{6}}$$

\frac{4}{6} va \frac{3}{6} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.

$$\frac{\frac{13}{20}}{\frac{4+3}{6}+\frac{5}{6}}$$

7 olish uchun 4 va 3'ni qo'shing.

$$\frac{\frac{13}{20}}{\frac{7}{6}+\frac{5}{6}}$$

\frac{7}{6} va \frac{5}{6} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.

$$\frac{\frac{13}{20}}{\frac{7+5}{6}}$$

12 olish uchun 7 va 5'ni qo'shing.

$$\frac{\frac{13}{20}}{\frac{12}{6}}$$

2 ni olish uchun 12 ni 6 ga bo‘ling.

$$\frac{\frac{13}{20}}{2}$$

\frac{\frac{13}{20}}{2} ni yagona kasrga aylantiring.

$$\frac{13}{20\times 2}$$

40 hosil qilish uchun 20 va 2 ni ko'paytirish.

$$\frac{13}{40}$$

Omil

$$\frac{13}{2 ^ {3} \cdot 5} = 0,325$$