1/2+(-1/5)-1+2/3 eching

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

Baholash

$$-\frac{1}{30}\approx -0,033333333$$

Yechim qadamlari

2 va 5 ning eng kichik umumiy karralisi 10 ga teng. \frac{1}{2} va \frac{1}{5} ni 10 maxraj bilan kasrlarga aylantirib oling.

$$\frac{5}{10}-\frac{2}{10}-1+\frac{2}{3}$$

\frac{5}{10} va \frac{2}{10} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{5-2}{10}-1+\frac{2}{3}$$

3 olish uchun 5 dan 2 ni ayirish.

$$\frac{3}{10}-1+\frac{2}{3}$$

1 ni \frac{10}{10} kasrga o‘giring.

$$\frac{3}{10}-\frac{10}{10}+\frac{2}{3}$$

\frac{3}{10} va \frac{10}{10} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{3-10}{10}+\frac{2}{3}$$

-7 olish uchun 3 dan 10 ni ayirish.

$$-\frac{7}{10}+\frac{2}{3}$$

10 va 3 ning eng kichik umumiy karralisi 30 ga teng. -\frac{7}{10} va \frac{2}{3} ni 30 maxraj bilan kasrlarga aylantirib oling.

$$-\frac{21}{30}+\frac{20}{30}$$

-\frac{21}{30} va \frac{20}{30} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.

$$\frac{-21+20}{30}$$

-1 olish uchun -21 va 20'ni qo'shing.

$$-\frac{1}{30}$$

Omil

$$-\frac{1}{30} = -0,03333333333333333$$