31/10*3/10+1/5div1/20=? eching

$$\frac { 31 } { 10 } \times \frac { 3 } { 10 } + \frac { 1 } { 5 } \div \frac { 1 } { 20 } = ?$$

Baholash

$$\frac{493}{100}=4,93$$

Yechim qadamlari

Suratni maxrajga va maxrajini suratga ko‘paytirish orqali \frac{31}{10} ni \frac{3}{10} ga ko‘paytiring.

$$\frac{31\times 3}{10\times 10}+\frac{\frac{1}{5}}{\frac{1}{20}}$$

\frac{31\times 3}{10\times 10} kasridagi ko‘paytirishlarni bajaring.

$$\frac{93}{100}+\frac{\frac{1}{5}}{\frac{1}{20}}$$

\frac{1}{5} ni \frac{1}{20} ga bo'lish \frac{1}{5} ga k'paytirish \frac{1}{20} ga qaytarish.

$$\frac{93}{100}+\frac{1}{5}\times 20$$

\frac{20}{5} hosil qilish uchun \frac{1}{5} va 20 ni ko'paytirish.

$$\frac{93}{100}+\frac{20}{5}$$

4 ni olish uchun 20 ni 5 ga bo‘ling.

$$\frac{93}{100}+4$$

4 ni \frac{400}{100} kasrga o‘giring.

$$\frac{93}{100}+\frac{400}{100}$$

\frac{93}{100} va \frac{400}{100} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.

$$\frac{93+400}{100}$$

493 olish uchun 93 va 400'ni qo'shing.

$$\frac{493}{100}$$

Omil

$$\frac{17 \cdot 29}{2 ^ {2} \cdot 5 ^ {2}} = 4\frac{93}{100} = 4,93$$