2/5div21/4 eching

$$\frac { 2 } { 5 } \div 2 \frac { 1 } { 4 }$$

Baholash

$$\frac{8}{45}\approx 0,177777778$$

Yechim qadamlari

\frac{2}{5} ni \frac{2\times 4+1}{4} ga bo'lish \frac{2}{5} ga k'paytirish \frac{2\times 4+1}{4} ga qaytarish.

$$\frac{2\times 4}{5\left(2\times 4+1\right)}$$

8 hosil qilish uchun 2 va 4 ni ko'paytirish.

$$\frac{8}{5\left(2\times 4+1\right)}$$

8 hosil qilish uchun 2 va 4 ni ko'paytirish.

$$\frac{8}{5\left(8+1\right)}$$

9 olish uchun 8 va 1'ni qo'shing.

$$\frac{8}{5\times 9}$$

45 hosil qilish uchun 5 va 9 ni ko'paytirish.

$$\frac{8}{45}$$

Omil

$$\frac{2 ^ {3}}{3 ^ {2} \cdot 5} = 0,17777777777777778$$