21div13/4div22/9 eching

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

Baholash

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

Yechim qadamlari

\frac{21}{\frac{1\times 4+3}{4}} ni \frac{2\times 9+2}{9} ga bo'lish \frac{21}{\frac{1\times 4+3}{4}} ga k'paytirish \frac{2\times 9+2}{9} ga qaytarish.

$$\frac{21\times 9}{\frac{1\times 4+3}{4}\left(2\times 9+2\right)}$$

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

$$\frac{189}{\frac{1\times 4+3}{4}\left(2\times 9+2\right)}$$

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

$$\frac{189}{\frac{4+3}{4}\left(2\times 9+2\right)}$$

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

$$\frac{189}{\frac{7}{4}\left(2\times 9+2\right)}$$

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

$$\frac{189}{\frac{7}{4}\left(18+2\right)}$$

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

$$\frac{189}{\frac{7}{4}\times 20}$$

\frac{7}{4}\times 20 ni yagona kasrga aylantiring.

$$\frac{189}{\frac{7\times 20}{4}}$$

140 hosil qilish uchun 7 va 20 ni ko'paytirish.

$$\frac{189}{\frac{140}{4}}$$

35 ni olish uchun 140 ni 4 ga bo‘ling.

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

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

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

Omil

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