21div8+2-12*3= eching

$$21 \div 8 + 2 - 12 \times 3 =$$

Baholash

$$-\frac{251}{8}=-31,375$$

Yechim qadamlari

2 ni \frac{16}{8} kasrga o‘giring.

$$\frac{21}{8}+\frac{16}{8}-12\times 3$$

\frac{21}{8} va \frac{16}{8} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.

$$\frac{21+16}{8}-12\times 3$$

37 olish uchun 21 va 16'ni qo'shing.

$$\frac{37}{8}-12\times 3$$

36 hosil qilish uchun 12 va 3 ni ko'paytirish.

$$\frac{37}{8}-36$$

36 ni \frac{288}{8} kasrga o‘giring.

$$\frac{37}{8}-\frac{288}{8}$$

\frac{37}{8} va \frac{288}{8} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{37-288}{8}$$

-251 olish uchun 37 dan 288 ni ayirish.

$$-\frac{251}{8}$$

Omil

$$-\frac{251}{8} = -31\frac{3}{8} = -31,375$$