5*21/4-225 eching

$$5 \times 2 \frac { 1 } { 4 } -225$$

Baholash

$$-\frac{855}{4}=-213,75$$

Yechim qadamlari

8 hosil qilish uchun 2 va 4 ni ko'paytirish.

$$5\times \frac{8+1}{4}-225$$

9 olish uchun 8 va 1'ni qo'shing.

$$5\times \frac{9}{4}-225$$

5\times \frac{9}{4} ni yagona kasrga aylantiring.

$$\frac{5\times 9}{4}-225$$

45 hosil qilish uchun 5 va 9 ni ko'paytirish.

$$\frac{45}{4}-225$$

225 ni \frac{900}{4} kasrga o‘giring.

$$\frac{45}{4}-\frac{900}{4}$$

\frac{45}{4} va \frac{900}{4} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{45-900}{4}$$

-855 olish uchun 45 dan 900 ni ayirish.

$$-\frac{855}{4}$$

Omil

$$-\frac{855}{4} = -213\frac{3}{4} = -213,75$$