-9/40*2^2+9/10*2 eching

$$- \frac{ 9 }{ 40 } \times { 2 }^{ 2 } + \frac{ 9 }{ 10 } \times 2$$

Baholash

$$\frac{9}{10}=0,9$$

Yechim qadamlari

2 daraja ko‘rsatkichini 2 ga hisoblang va 4 ni qiymatni oling.

$$-\frac{9}{40}\times 4+\frac{9}{10}\times 2$$

-\frac{9}{40}\times 4 ni yagona kasrga aylantiring.

$$\frac{-9\times 4}{40}+\frac{9}{10}\times 2$$

-36 hosil qilish uchun -9 va 4 ni ko'paytirish.

$$\frac{-36}{40}+\frac{9}{10}\times 2$$

\frac{-36}{40} ulushini 4 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$-\frac{9}{10}+\frac{9}{10}\times 2$$

\frac{9}{10}\times 2 ni yagona kasrga aylantiring.

$$-\frac{9}{10}+\frac{9\times 2}{10}$$

18 hosil qilish uchun 9 va 2 ni ko'paytirish.

$$-\frac{9}{10}+\frac{18}{10}$$

-\frac{9}{10} va \frac{18}{10} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.

$$\frac{-9+18}{10}$$

9 olish uchun -9 va 18'ni qo'shing.

$$\frac{9}{10}$$

Omil

$$\frac{3 ^ {2}}{2 \cdot 5} = 0,9$$