21div(13/4*22/9) eching

$$21 \div ( 1 \frac { 3 } { 4 } \times 2 \frac { 2 } { 9 } )$$

Baholash

$$\frac{27}{5}=5,4$$

Yechim qadamlari

4 hosil qilish uchun 1 va 4 ni ko'paytirish.

$$\frac{21}{\frac{4+3}{4}\times \frac{2\times 9+2}{9}}$$

7 olish uchun 4 va 3'ni qo'shing.

$$\frac{21}{\frac{7}{4}\times \frac{2\times 9+2}{9}}$$

18 hosil qilish uchun 2 va 9 ni ko'paytirish.

$$\frac{21}{\frac{7}{4}\times \frac{18+2}{9}}$$

20 olish uchun 18 va 2'ni qo'shing.

$$\frac{21}{\frac{7}{4}\times \frac{20}{9}}$$

Suratni maxrajga va maxrajini suratga ko‘paytirish orqali \frac{7}{4} ni \frac{20}{9} ga ko‘paytiring.

$$\frac{21}{\frac{7\times 20}{4\times 9}}$$

\frac{7\times 20}{4\times 9} kasridagi ko‘paytirishlarni bajaring.

$$\frac{21}{\frac{140}{36}}$$

\frac{140}{36} ulushini 4 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$\frac{21}{\frac{35}{9}}$$

21 ni \frac{35}{9} ga bo'lish 21 ga k'paytirish \frac{35}{9} ga qaytarish.

$$21\times \frac{9}{35}$$

21\times \frac{9}{35} ni yagona kasrga aylantiring.

$$\frac{21\times 9}{35}$$

189 hosil qilish uchun 21 va 9 ni ko'paytirish.

$$\frac{189}{35}$$

\frac{189}{35} ulushini 7 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$\frac{27}{5}$$

Omil

$$\frac{3 ^ {3}}{5} = 5\frac{2}{5} = 5,4$$