13/4*21/4 eching

$$1 \frac { 3 } { 4 } \cdot 2 \frac { 1 } { 4 }$$

Baholash

$$\frac{63}{16}=3,9375$$

Yechim qadamlari

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

$$\frac{4+3}{4}\times \frac{2\times 4+1}{4}$$

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

$$\frac{7}{4}\times \frac{2\times 4+1}{4}$$

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

$$\frac{7}{4}\times \frac{8+1}{4}$$

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

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

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

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

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

$$\frac{63}{16}$$

Omil

$$\frac{3 ^ {2} \cdot 7}{2 ^ {4}} = 3\frac{15}{16} = 3,9375$$