-8/7-1/5-3/4(293/140) eching

$$- \frac { 8 } { 7 } - \frac { 1 } { 5 } - \frac { 3 } { 4 } ( \frac { 293 } { 140 } )$$

Baholash

$$-\frac{233}{80}=-2,9125$$

Yechim qadamlari

7 va 5 ning eng kichik umumiy karralisi 35 ga teng. -\frac{8}{7} va \frac{1}{5} ni 35 maxraj bilan kasrlarga aylantirib oling.

$$-\frac{40}{35}-\frac{7}{35}-\frac{3}{4}\times \frac{293}{140}$$

-\frac{40}{35} va \frac{7}{35} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{-40-7}{35}-\frac{3}{4}\times \frac{293}{140}$$

-47 olish uchun -40 dan 7 ni ayirish.

$$-\frac{47}{35}-\frac{3}{4}\times \frac{293}{140}$$

Suratni maxrajga va maxrajini suratga ko‘paytirish orqali \frac{3}{4} ni \frac{293}{140} ga ko‘paytiring.

$$-\frac{47}{35}-\frac{3\times 293}{4\times 140}$$

\frac{3\times 293}{4\times 140} kasridagi ko‘paytirishlarni bajaring.

$$-\frac{47}{35}-\frac{879}{560}$$

35 va 560 ning eng kichik umumiy karralisi 560 ga teng. -\frac{47}{35} va \frac{879}{560} ni 560 maxraj bilan kasrlarga aylantirib oling.

$$-\frac{752}{560}-\frac{879}{560}$$

-\frac{752}{560} va \frac{879}{560} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{-752-879}{560}$$

-1631 olish uchun -752 dan 879 ni ayirish.

$$\frac{-1631}{560}$$

\frac{-1631}{560} ulushini 7 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$-\frac{233}{80}$$

Omil

$$-\frac{233}{80} = -2\frac{73}{80} = -2,9125$$