(1/4-2/5)div(1/2-1/5) eching

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

Baholash

$$-\frac{1}{2}=-0,5$$

Yechim qadamlari

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

$$\frac{\frac{5}{20}-\frac{8}{20}}{\frac{1}{2}-\frac{1}{5}}$$

\frac{5}{20} va \frac{8}{20} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{\frac{5-8}{20}}{\frac{1}{2}-\frac{1}{5}}$$

-3 olish uchun 5 dan 8 ni ayirish.

$$\frac{-\frac{3}{20}}{\frac{1}{2}-\frac{1}{5}}$$

2 va 5 ning eng kichik umumiy karralisi 10 ga teng. \frac{1}{2} va \frac{1}{5} ni 10 maxraj bilan kasrlarga aylantirib oling.

$$\frac{-\frac{3}{20}}{\frac{5}{10}-\frac{2}{10}}$$

\frac{5}{10} va \frac{2}{10} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{-\frac{3}{20}}{\frac{5-2}{10}}$$

3 olish uchun 5 dan 2 ni ayirish.

$$\frac{-\frac{3}{20}}{\frac{3}{10}}$$

-\frac{3}{20} ni \frac{3}{10} ga bo'lish -\frac{3}{20} ga k'paytirish \frac{3}{10} ga qaytarish.

$$-\frac{3}{20}\times \frac{10}{3}$$

Suratni maxrajga va maxrajini suratga ko‘paytirish orqali -\frac{3}{20} ni \frac{10}{3} ga ko‘paytiring.

$$\frac{-3\times 10}{20\times 3}$$

\frac{-3\times 10}{20\times 3} kasridagi ko‘paytirishlarni bajaring.

$$\frac{-30}{60}$$

\frac{-30}{60} ulushini 30 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$-\frac{1}{2}$$

Omil

$$-\frac{1}{2} = -0,5$$