-15/20-610/20 eching

$$-1 \frac{ 5 }{ 20 } -6 \frac{ 10 }{ 20 }$$

Baholash

$$-\frac{31}{4}=-7,75$$

Yechim qadamlari

20 hosil qilish uchun 1 va 20 ni ko'paytirish.

$$-\frac{20+5}{20}-\frac{6\times 20+10}{20}$$

25 olish uchun 20 va 5'ni qo'shing.

$$-\frac{25}{20}-\frac{6\times 20+10}{20}$$

\frac{25}{20} ulushini 5 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$-\frac{5}{4}-\frac{6\times 20+10}{20}$$

120 hosil qilish uchun 6 va 20 ni ko'paytirish.

$$-\frac{5}{4}-\frac{120+10}{20}$$

130 olish uchun 120 va 10'ni qo'shing.

$$-\frac{5}{4}-\frac{130}{20}$$

\frac{130}{20} ulushini 10 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$-\frac{5}{4}-\frac{13}{2}$$

4 va 2 ning eng kichik umumiy karralisi 4 ga teng. -\frac{5}{4} va \frac{13}{2} ni 4 maxraj bilan kasrlarga aylantirib oling.

$$-\frac{5}{4}-\frac{26}{4}$$

-\frac{5}{4} va \frac{26}{4} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{-5-26}{4}$$

-31 olish uchun -5 dan 26 ni ayirish.

$$-\frac{31}{4}$$

Omil

$$-\frac{31}{4} = -7\frac{3}{4} = -7,75$$