-6/10*-2/7+2/5 eching

$$\frac{ -6 }{ 10 } \times \frac{ -2 }{ 7 } + \frac{ 2 }{ 5 }$$

Baholash

$$\frac{4}{7}\approx 0,571428571$$

Yechim qadamlari

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

$$-\frac{3}{5}\times \frac{-2}{7}+\frac{2}{5}$$

\frac{-2}{7} kasri manfiy belgini olib tashlash bilan -\frac{2}{7} sifatida qayta yozilishi mumkin.

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

Suratni maxrajga va maxrajini suratga ko‘paytirish orqali -\frac{3}{5} ni -\frac{2}{7} ga ko‘paytiring.

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

\frac{-3\left(-2\right)}{5\times 7} kasridagi ko‘paytirishlarni bajaring.

$$\frac{6}{35}+\frac{2}{5}$$

35 va 5 ning eng kichik umumiy karralisi 35 ga teng. \frac{6}{35} va \frac{2}{5} ni 35 maxraj bilan kasrlarga aylantirib oling.

$$\frac{6}{35}+\frac{14}{35}$$

\frac{6}{35} va \frac{14}{35} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.

$$\frac{6+14}{35}$$

20 olish uchun 6 va 14'ni qo'shing.

$$\frac{20}{35}$$

\frac{20}{35} ulushini 5 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$\frac{4}{7}$$

Omil

$$\frac{2 ^ {2}}{7} = 0,5714285714285714$$