20-2/3:4/3 eching

$$20 - \frac { 2 } { 3 } : \frac { 4 } { 3 }$$

Baholash

$$\frac{39}{2}=19,5$$

Yechim qadamlari

\frac{2}{3} ni \frac{4}{3} ga bo'lish \frac{2}{3} ga k'paytirish \frac{4}{3} ga qaytarish.

$$20-\frac{2}{3}\times \frac{3}{4}$$

Suratni maxrajga va maxrajini suratga ko‘paytirish orqali \frac{2}{3} ni \frac{3}{4} ga ko‘paytiring.

$$20-\frac{2\times 3}{3\times 4}$$

Surat va maxrajdagi ikkala 3 ni qisqartiring.

$$20-\frac{2}{4}$$

\frac{2}{4} ulushini 2 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$20-\frac{1}{2}$$

20 ni \frac{40}{2} kasrga o‘giring.

$$\frac{40}{2}-\frac{1}{2}$$

\frac{40}{2} va \frac{1}{2} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{40-1}{2}$$

39 olish uchun 40 dan 1 ni ayirish.

$$\frac{39}{2}$$

Omil

$$\frac{3 \cdot 13}{2} = 19\frac{1}{2} = 19,5$$