-7/5-(-2)*5/6= eching

$$- \frac { 7 } { 5 } - ( - 2 ) \cdot \frac { 5 } { 6 } =$$

Baholash

$$\frac{4}{15}\approx 0,266666667$$

Yechim qadamlari

-2\times \frac{5}{6} ni yagona kasrga aylantiring.

$$-\frac{7}{5}-\frac{-2\times 5}{6}$$

-10 hosil qilish uchun -2 va 5 ni ko'paytirish.

$$-\frac{7}{5}-\frac{-10}{6}$$

\frac{-10}{6} ulushini 2 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$-\frac{7}{5}-\left(-\frac{5}{3}\right)$$

-\frac{5}{3} ning teskarisi \frac{5}{3} ga teng.

$$-\frac{7}{5}+\frac{5}{3}$$

5 va 3 ning eng kichik umumiy karralisi 15 ga teng. -\frac{7}{5} va \frac{5}{3} ni 15 maxraj bilan kasrlarga aylantirib oling.

$$-\frac{21}{15}+\frac{25}{15}$$

-\frac{21}{15} va \frac{25}{15} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.

$$\frac{-21+25}{15}$$

4 olish uchun -21 va 25'ni qo'shing.

$$\frac{4}{15}$$

Omil

$$\frac{2 ^ {2}}{3 \cdot 5} = 0,26666666666666666$$