20+20+20*20:30= eching

$$20 + 20 + 20 \times 20 : 30 =$$

Baholash

$$\frac{160}{3}\approx 53,333333333$$

Yechim qadamlari

40 olish uchun 20 va 20'ni qo'shing.

$$40+\frac{20\times 20}{30}$$

400 hosil qilish uchun 20 va 20 ni ko'paytirish.

$$40+\frac{400}{30}$$

\frac{400}{30} ulushini 10 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$40+\frac{40}{3}$$

40 ni \frac{120}{3} kasrga o‘giring.

$$\frac{120}{3}+\frac{40}{3}$$

\frac{120}{3} va \frac{40}{3} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.

$$\frac{120+40}{3}$$

160 olish uchun 120 va 40'ni qo'shing.

$$\frac{160}{3}$$

Omil

$$\frac{2 ^ {5} \cdot 5}{3} = 53\frac{1}{3} = 53,333333333333336$$