20*85div285*15div20 eching

$$20 \times 85 \div 285 \times 15 \div 20$$

Baholash

$$\frac{85}{19}\approx 4,473684211$$

Yechim qadamlari

1700 hosil qilish uchun 20 va 85 ni ko'paytirish.

$$\frac{\frac{1700}{285}\times 15}{20}$$

\frac{1700}{285} ulushini 5 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$\frac{\frac{340}{57}\times 15}{20}$$

\frac{340}{57}\times 15 ni yagona kasrga aylantiring.

$$\frac{\frac{340\times 15}{57}}{20}$$

5100 hosil qilish uchun 340 va 15 ni ko'paytirish.

$$\frac{\frac{5100}{57}}{20}$$

\frac{5100}{57} ulushini 3 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$\frac{\frac{1700}{19}}{20}$$

\frac{\frac{1700}{19}}{20} ni yagona kasrga aylantiring.

$$\frac{1700}{19\times 20}$$

380 hosil qilish uchun 19 va 20 ni ko'paytirish.

$$\frac{1700}{380}$$

\frac{1700}{380} ulushini 20 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$\frac{85}{19}$$

Omil

$$\frac{5 \cdot 17}{19} = 4\frac{9}{19} = 4,473684210526316$$