1-(1/8+1/10) eching

$$1 - ( \frac { 1 } { 8 } + \frac { 1 } { 10 } )$$

Baholash

$$\frac{31}{40}=0,775$$

Yechim qadamlari

8 va 10 ning eng kichik umumiy karralisi 40 ga teng. \frac{1}{8} va \frac{1}{10} ni 40 maxraj bilan kasrlarga aylantirib oling.

$$1-\left(\frac{5}{40}+\frac{4}{40}\right)$$

\frac{5}{40} va \frac{4}{40} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.

$$1-\frac{5+4}{40}$$

9 olish uchun 5 va 4'ni qo'shing.

$$1-\frac{9}{40}$$

1 ni \frac{40}{40} kasrga o‘giring.

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

\frac{40}{40} va \frac{9}{40} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

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

31 olish uchun 40 dan 9 ni ayirish.

$$\frac{31}{40}$$

Omil

$$\frac{31}{2 ^ {3} \cdot 5} = 0,775$$