23/7-(-12/5)= eching

$$2 \frac { 3 } { 7 } - ( - 1 \frac { 2 } { 5 } ) =$$

Baholash

$$\frac{134}{35}\approx 3,828571429$$

Yechim qadamlari

14 hosil qilish uchun 2 va 7 ni ko'paytirish.

$$\frac{14+3}{7}-\left(-\frac{1\times 5+2}{5}\right)$$

17 olish uchun 14 va 3'ni qo'shing.

$$\frac{17}{7}-\left(-\frac{1\times 5+2}{5}\right)$$

5 hosil qilish uchun 1 va 5 ni ko'paytirish.

$$\frac{17}{7}-\left(-\frac{5+2}{5}\right)$$

7 olish uchun 5 va 2'ni qo'shing.

$$\frac{17}{7}-\left(-\frac{7}{5}\right)$$

-\frac{7}{5} ning teskarisi \frac{7}{5} ga teng.

$$\frac{17}{7}+\frac{7}{5}$$

7 va 5 ning eng kichik umumiy karralisi 35 ga teng. \frac{17}{7} va \frac{7}{5} ni 35 maxraj bilan kasrlarga aylantirib oling.

$$\frac{85}{35}+\frac{49}{35}$$

\frac{85}{35} va \frac{49}{35} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.

$$\frac{85+49}{35}$$

134 olish uchun 85 va 49'ni qo'shing.

$$\frac{134}{35}$$

Omil

$$\frac{2 \cdot 67}{5 \cdot 7} = 3\frac{29}{35} = 3,8285714285714287$$