70+100-80/150-80*50 eching

$$70+ \frac{ 100-80 }{ 150-80 } \times 50$$

Baholash

$$\frac{590}{7}\approx 84,285714286$$

Yechim qadamlari

20 olish uchun 100 dan 80 ni ayirish.

$$70+\frac{20}{150-80}\times 50$$

70 olish uchun 150 dan 80 ni ayirish.

$$70+\frac{20}{70}\times 50$$

\frac{20}{70} ulushini 10 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$70+\frac{2}{7}\times 50$$

\frac{2}{7}\times 50 ni yagona kasrga aylantiring.

$$70+\frac{2\times 50}{7}$$

100 hosil qilish uchun 2 va 50 ni ko'paytirish.

$$70+\frac{100}{7}$$

70 ni \frac{490}{7} kasrga o‘giring.

$$\frac{490}{7}+\frac{100}{7}$$

\frac{490}{7} va \frac{100}{7} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.

$$\frac{490+100}{7}$$

590 olish uchun 490 va 100'ni qo'shing.

$$\frac{590}{7}$$

Omil

$$\frac{2 \cdot 5 \cdot 59}{7} = 84\frac{2}{7} = 84,28571428571429$$