(-54/5)-21/4 eching

$$( - 5 \frac { 4 } { 5 } ) - 2 \frac { 1 } { 4 }$$

Baholash

$$-\frac{161}{20}=-8,05$$

Yechim qadamlari

25 hosil qilish uchun 5 va 5 ni ko'paytirish.

$$-\frac{25+4}{5}-\frac{2\times 4+1}{4}$$

29 olish uchun 25 va 4'ni qo'shing.

$$-\frac{29}{5}-\frac{2\times 4+1}{4}$$

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

$$-\frac{29}{5}-\frac{8+1}{4}$$

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

$$-\frac{29}{5}-\frac{9}{4}$$

5 va 4 ning eng kichik umumiy karralisi 20 ga teng. -\frac{29}{5} va \frac{9}{4} ni 20 maxraj bilan kasrlarga aylantirib oling.

$$-\frac{116}{20}-\frac{45}{20}$$

-\frac{116}{20} va \frac{45}{20} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{-116-45}{20}$$

-161 olish uchun -116 dan 45 ni ayirish.

$$-\frac{161}{20}$$

Omil

$$-\frac{161}{20} = -8\frac{1}{20} = -8,05$$