(1/4)+4/5+2/5:(2/3) eching

$$( \frac { 1 } { 4 } ) + \frac { 4 } { 5 } + \frac { 2 } { 5 } : ( \frac { 2 } { 3 } )$$

Baholash

$$\frac{33}{20}=1,65$$

Yechim qadamlari

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

$$\frac{5}{20}+\frac{16}{20}+\frac{\frac{2}{5}}{\frac{2}{3}}$$

\frac{5}{20} va \frac{16}{20} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.

$$\frac{5+16}{20}+\frac{\frac{2}{5}}{\frac{2}{3}}$$

21 olish uchun 5 va 16'ni qo'shing.

$$\frac{21}{20}+\frac{\frac{2}{5}}{\frac{2}{3}}$$

\frac{2}{5} ni \frac{2}{3} ga bo'lish \frac{2}{5} ga k'paytirish \frac{2}{3} ga qaytarish.

$$\frac{21}{20}+\frac{2}{5}\times \frac{3}{2}$$

Suratni maxrajga va maxrajini suratga ko‘paytirish orqali \frac{2}{5} ni \frac{3}{2} ga ko‘paytiring.

$$\frac{21}{20}+\frac{2\times 3}{5\times 2}$$

Surat va maxrajdagi ikkala 2 ni qisqartiring.

$$\frac{21}{20}+\frac{3}{5}$$

20 va 5 ning eng kichik umumiy karralisi 20 ga teng. \frac{21}{20} va \frac{3}{5} ni 20 maxraj bilan kasrlarga aylantirib oling.

$$\frac{21}{20}+\frac{12}{20}$$

\frac{21}{20} va \frac{12}{20} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.

$$\frac{21+12}{20}$$

33 olish uchun 21 va 12'ni qo'shing.

$$\frac{33}{20}$$

Omil

$$\frac{3 \cdot 11}{2 ^ {2} \cdot 5} = 1\frac{13}{20} = 1,65$$