0+(2/5)+(-4)/(2/5)+1 eching

$$\frac { 0 + ( 2 / 5 ) + ( - 4 ) } { ( 2 / 5 ) + 1 }$$

Baholash

$$-\frac{18}{7}\approx -2,571428571$$

Yechim qadamlari

\frac{2}{5} olish uchun 0 va \frac{2}{5}'ni qo'shing.

$$\frac{\frac{2}{5}-4}{\frac{2}{5}+1}$$

4 ni \frac{20}{5} kasrga o‘giring.

$$\frac{\frac{2}{5}-\frac{20}{5}}{\frac{2}{5}+1}$$

\frac{2}{5} va \frac{20}{5} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{\frac{2-20}{5}}{\frac{2}{5}+1}$$

-18 olish uchun 2 dan 20 ni ayirish.

$$\frac{-\frac{18}{5}}{\frac{2}{5}+1}$$

1 ni \frac{5}{5} kasrga o‘giring.

$$\frac{-\frac{18}{5}}{\frac{2}{5}+\frac{5}{5}}$$

\frac{2}{5} va \frac{5}{5} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.

$$\frac{-\frac{18}{5}}{\frac{2+5}{5}}$$

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

$$\frac{-\frac{18}{5}}{\frac{7}{5}}$$

-\frac{18}{5} ni \frac{7}{5} ga bo'lish -\frac{18}{5} ga k'paytirish \frac{7}{5} ga qaytarish.

$$-\frac{18}{5}\times \frac{5}{7}$$

Suratni maxrajga va maxrajini suratga ko‘paytirish orqali -\frac{18}{5} ni \frac{5}{7} ga ko‘paytiring.

$$\frac{-18\times 5}{5\times 7}$$

Surat va maxrajdagi ikkala 5 ni qisqartiring.

$$\frac{-18}{7}$$

\frac{-18}{7} kasri manfiy belgini olib tashlash bilan -\frac{18}{7} sifatida qayta yozilishi mumkin.

$$-\frac{18}{7}$$

Omil

$$-\frac{18}{7} = -2\frac{4}{7} = -2,5714285714285716$$