1/2*21/2(11/2+2) eching

$$\frac{ 1 }{ 2 } \times 2 \frac{ 1 }{ 2 } (1 \frac{ 1 }{ 2 } +2)$$

Baholash

$$\frac{35}{8}=4,375$$

Yechim qadamlari

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

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

5 olish uchun 4 va 1'ni qo'shing.

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

Suratni maxrajga va maxrajini suratga ko‘paytirish orqali \frac{1}{2} ni \frac{5}{2} ga ko‘paytiring.

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

\frac{1\times 5}{2\times 2} kasridagi ko‘paytirishlarni bajaring.

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

2 hosil qilish uchun 1 va 2 ni ko'paytirish.

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

3 olish uchun 2 va 1'ni qo'shing.

$$\frac{5}{4}\left(\frac{3}{2}+2\right)$$

2 ni \frac{4}{2} kasrga o‘giring.

$$\frac{5}{4}\left(\frac{3}{2}+\frac{4}{2}\right)$$

\frac{3}{2} va \frac{4}{2} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.

$$\frac{5}{4}\times \frac{3+4}{2}$$

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

$$\frac{5}{4}\times \frac{7}{2}$$

Suratni maxrajga va maxrajini suratga ko‘paytirish orqali \frac{5}{4} ni \frac{7}{2} ga ko‘paytiring.

$$\frac{5\times 7}{4\times 2}$$

\frac{5\times 7}{4\times 2} kasridagi ko‘paytirishlarni bajaring.

$$\frac{35}{8}$$

Omil

$$\frac{5 \cdot 7}{2 ^ {3}} = 4\frac{3}{8} = 4,375$$