18+-18/5--61/10= eching

$$18 + \frac { - 18 } { 5 } - - 6 \frac { 1 } { 10 } =$$

Baholash

$$\frac{41}{2}=20,5$$

Yechim qadamlari

\frac{-18}{5} kasri manfiy belgini olib tashlash bilan -\frac{18}{5} sifatida qayta yozilishi mumkin.

$$18-\frac{18}{5}-\left(-\frac{6\times 10+1}{10}\right)$$

18 ni \frac{90}{5} kasrga o‘giring.

$$\frac{90}{5}-\frac{18}{5}-\left(-\frac{6\times 10+1}{10}\right)$$

\frac{90}{5} va \frac{18}{5} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{90-18}{5}-\left(-\frac{6\times 10+1}{10}\right)$$

72 olish uchun 90 dan 18 ni ayirish.

$$\frac{72}{5}-\left(-\frac{6\times 10+1}{10}\right)$$

60 hosil qilish uchun 6 va 10 ni ko'paytirish.

$$\frac{72}{5}-\left(-\frac{60+1}{10}\right)$$

61 olish uchun 60 va 1'ni qo'shing.

$$\frac{72}{5}-\left(-\frac{61}{10}\right)$$

-\frac{61}{10} ning teskarisi \frac{61}{10} ga teng.

$$\frac{72}{5}+\frac{61}{10}$$

5 va 10 ning eng kichik umumiy karralisi 10 ga teng. \frac{72}{5} va \frac{61}{10} ni 10 maxraj bilan kasrlarga aylantirib oling.

$$\frac{144}{10}+\frac{61}{10}$$

\frac{144}{10} va \frac{61}{10} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.

$$\frac{144+61}{10}$$

205 olish uchun 144 va 61'ni qo'shing.

$$\frac{205}{10}$$

\frac{205}{10} ulushini 5 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$\frac{41}{2}$$

Omil

$$\frac{41}{2} = 20\frac{1}{2} = 20,5$$