624div(-100)*[(-2/5)+1/4] eching

$$624 \div ( - 100 ) \times [ ( - \frac { 2 } { 5 } ) + \frac { 1 } { 4 } ]$$

Baholash

$$\frac{117}{125}=0,936$$

Yechim qadamlari

\frac{624}{-100} ulushini 4 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$-\frac{156}{25}\left(-\frac{2}{5}+\frac{1}{4}\right)$$

5 va 4 ning eng kichik umumiy karralisi 20 ga teng. -\frac{2}{5} va \frac{1}{4} ni 20 maxraj bilan kasrlarga aylantirib oling.

$$-\frac{156}{25}\left(-\frac{8}{20}+\frac{5}{20}\right)$$

-\frac{8}{20} va \frac{5}{20} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.

$$-\frac{156}{25}\times \frac{-8+5}{20}$$

-3 olish uchun -8 va 5'ni qo'shing.

$$-\frac{156}{25}\left(-\frac{3}{20}\right)$$

Suratni maxrajga va maxrajini suratga ko‘paytirish orqali -\frac{156}{25} ni -\frac{3}{20} ga ko‘paytiring.

$$\frac{-156\left(-3\right)}{25\times 20}$$

\frac{-156\left(-3\right)}{25\times 20} kasridagi ko‘paytirishlarni bajaring.

$$\frac{468}{500}$$

\frac{468}{500} ulushini 4 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$\frac{117}{125}$$

Omil

$$\frac{3 ^ {2} \cdot 13}{5 ^ {3}} = 0,936$$