(3+7)2-5(10-5)4+209:2 eching

$$( 3 + 7 ) 2 - 5 ( 10 - 5 ) 4 + 209 : 2$$

Baholash

$$\frac{49}{2}=24,5$$

Yechim qadamlari

10 olish uchun 3 va 7'ni qo'shing.

$$10\times 2-5\left(10-5\right)\times 4+\frac{209}{2}$$

20 hosil qilish uchun 10 va 2 ni ko'paytirish.

$$20-5\left(10-5\right)\times 4+\frac{209}{2}$$

5 olish uchun 10 dan 5 ni ayirish.

$$20-5\times 5\times 4+\frac{209}{2}$$

25 hosil qilish uchun 5 va 5 ni ko'paytirish.

$$20-25\times 4+\frac{209}{2}$$

100 hosil qilish uchun 25 va 4 ni ko'paytirish.

$$20-100+\frac{209}{2}$$

-80 olish uchun 20 dan 100 ni ayirish.

$$-80+\frac{209}{2}$$

-80 ni -\frac{160}{2} kasrga o‘giring.

$$-\frac{160}{2}+\frac{209}{2}$$

-\frac{160}{2} va \frac{209}{2} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.

$$\frac{-160+209}{2}$$

49 olish uchun -160 va 209'ni qo'shing.

$$\frac{49}{2}$$

Omil

$$\frac{7 ^ {2}}{2} = 24\frac{1}{2} = 24,5$$