9*(7/30-7/90+1/3) eching

$$9 \times ( \frac{ 7 }{ 30 } - \frac{ 7 }{ 90 } + \frac{ 1 }{ 3 } )$$

Baholash

$$\frac{22}{5}=4,4$$

Yechim qadamlari

30 va 90 ning eng kichik umumiy karralisi 90 ga teng. \frac{7}{30} va \frac{7}{90} ni 90 maxraj bilan kasrlarga aylantirib oling.

$$9\left(\frac{21}{90}-\frac{7}{90}+\frac{1}{3}\right)$$

\frac{21}{90} va \frac{7}{90} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$9\left(\frac{21-7}{90}+\frac{1}{3}\right)$$

14 olish uchun 21 dan 7 ni ayirish.

$$9\left(\frac{14}{90}+\frac{1}{3}\right)$$

\frac{14}{90} ulushini 2 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$9\left(\frac{7}{45}+\frac{1}{3}\right)$$

45 va 3 ning eng kichik umumiy karralisi 45 ga teng. \frac{7}{45} va \frac{1}{3} ni 45 maxraj bilan kasrlarga aylantirib oling.

$$9\left(\frac{7}{45}+\frac{15}{45}\right)$$

\frac{7}{45} va \frac{15}{45} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.

$$9\times \frac{7+15}{45}$$

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

$$9\times \frac{22}{45}$$

9\times \frac{22}{45} ni yagona kasrga aylantiring.

$$\frac{9\times 22}{45}$$

198 hosil qilish uchun 9 va 22 ni ko'paytirish.

$$\frac{198}{45}$$

\frac{198}{45} ulushini 9 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$\frac{22}{5}$$

Omil

$$\frac{2 \cdot 11}{5} = 4\frac{2}{5} = 4,4$$