15-[7-(21/4+17/8)] eching

$$15 - [ 7 - ( 2 \frac { 1 } { 4 } + 1 \frac { 7 } { 8 } ) ]$$

Baholash

$$\frac{97}{8}=12,125$$

Yechim qadamlari

8 hosil qilish uchun 2 va 4 ni ko'paytirish.

$$15-\left(7-\left(\frac{8+1}{4}+\frac{1\times 8+7}{8}\right)\right)$$

9 olish uchun 8 va 1'ni qo'shing.

$$15-\left(7-\left(\frac{9}{4}+\frac{1\times 8+7}{8}\right)\right)$$

8 hosil qilish uchun 1 va 8 ni ko'paytirish.

$$15-\left(7-\left(\frac{9}{4}+\frac{8+7}{8}\right)\right)$$

15 olish uchun 8 va 7'ni qo'shing.

$$15-\left(7-\left(\frac{9}{4}+\frac{15}{8}\right)\right)$$

4 va 8 ning eng kichik umumiy karralisi 8 ga teng. \frac{9}{4} va \frac{15}{8} ni 8 maxraj bilan kasrlarga aylantirib oling.

$$15-\left(7-\left(\frac{18}{8}+\frac{15}{8}\right)\right)$$

\frac{18}{8} va \frac{15}{8} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.

$$15-\left(7-\frac{18+15}{8}\right)$$

33 olish uchun 18 va 15'ni qo'shing.

$$15-\left(7-\frac{33}{8}\right)$$

7 ni \frac{56}{8} kasrga o‘giring.

$$15-\left(\frac{56}{8}-\frac{33}{8}\right)$$

\frac{56}{8} va \frac{33}{8} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$15-\frac{56-33}{8}$$

23 olish uchun 56 dan 33 ni ayirish.

$$15-\frac{23}{8}$$

15 ni \frac{120}{8} kasrga o‘giring.

$$\frac{120}{8}-\frac{23}{8}$$

\frac{120}{8} va \frac{23}{8} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{120-23}{8}$$

97 olish uchun 120 dan 23 ni ayirish.

$$\frac{97}{8}$$

Omil

$$\frac{97}{2 ^ {3}} = 12\frac{1}{8} = 12,125$$