5/6+(-13)/21 eching

$$\frac { 5 } { 6 } + \frac { ( - 13 ) } { 21 }$$

Baholash

$$\frac{3}{14}\approx 0,214285714$$

Yechim qadamlari

\frac{-13}{21} kasri manfiy belgini olib tashlash bilan -\frac{13}{21} sifatida qayta yozilishi mumkin.

$$\frac{5}{6}-\frac{13}{21}$$

6 va 21 ning eng kichik umumiy karralisi 42 ga teng. \frac{5}{6} va \frac{13}{21} ni 42 maxraj bilan kasrlarga aylantirib oling.

$$\frac{35}{42}-\frac{26}{42}$$

\frac{35}{42} va \frac{26}{42} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{35-26}{42}$$

9 olish uchun 35 dan 26 ni ayirish.

$$\frac{9}{42}$$

\frac{9}{42} ulushini 3 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$\frac{3}{14}$$

Omil

$$\frac{3}{2 \cdot 7} = 0,21428571428571427$$