30+15-10/2*15-10-12*10 eching

$$30 + \frac { 15 - 10 } { 2 \times 15 - 10 - 12 } \times 10$$

Baholash

$$\frac{145}{4}=36,25$$

Yechim qadamlari

5 olish uchun 15 dan 10 ni ayirish.

$$30+\frac{5}{2\times 15-10-12}\times 10$$

30 hosil qilish uchun 2 va 15 ni ko'paytirish.

$$30+\frac{5}{30-10-12}\times 10$$

20 olish uchun 30 dan 10 ni ayirish.

$$30+\frac{5}{20-12}\times 10$$

8 olish uchun 20 dan 12 ni ayirish.

$$30+\frac{5}{8}\times 10$$

\frac{5}{8}\times 10 ni yagona kasrga aylantiring.

$$30+\frac{5\times 10}{8}$$

50 hosil qilish uchun 5 va 10 ni ko'paytirish.

$$30+\frac{50}{8}$$

\frac{50}{8} ulushini 2 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$30+\frac{25}{4}$$

30 ni \frac{120}{4} kasrga o‘giring.

$$\frac{120}{4}+\frac{25}{4}$$

\frac{120}{4} va \frac{25}{4} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.

$$\frac{120+25}{4}$$

145 olish uchun 120 va 25'ni qo'shing.

$$\frac{145}{4}$$

Omil

$$\frac{5 \cdot 29}{2 ^ {2}} = 36\frac{1}{4} = 36,25$$