1/5+1/9-1/5*9 eching

$$\frac { 1 } { 5 } + \frac { 1 } { 9 } - \frac { 1 } { 5 \times 9 }$$

Baholash

$$\frac{13}{45}\approx 0,288888889$$

Yechim qadamlari

5 va 9 ning eng kichik umumiy karralisi 45 ga teng. \frac{1}{5} va \frac{1}{9} ni 45 maxraj bilan kasrlarga aylantirib oling.

$$\frac{9}{45}+\frac{5}{45}-\frac{1}{5\times 9}$$

\frac{9}{45} va \frac{5}{45} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.

$$\frac{9+5}{45}-\frac{1}{5\times 9}$$

14 olish uchun 9 va 5'ni qo'shing.

$$\frac{14}{45}-\frac{1}{5\times 9}$$

45 hosil qilish uchun 5 va 9 ni ko'paytirish.

$$\frac{14}{45}-\frac{1}{45}$$

\frac{14}{45} va \frac{1}{45} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{14-1}{45}$$

13 olish uchun 14 dan 1 ni ayirish.

$$\frac{13}{45}$$

Omil

$$\frac{13}{3 ^ {2} \cdot 5} = 0,28888888888888886$$