1407/30-1385/12= eching

$$140 \frac { 7 } { 30 } - 138 \frac { 5 } { 12 } =$$

Baholash

$$\frac{109}{60}\approx 1,816666667$$

Yechim qadamlari

4200 hosil qilish uchun 140 va 30 ni ko'paytirish.

$$\frac{4200+7}{30}-\frac{138\times 12+5}{12}$$

4207 olish uchun 4200 va 7'ni qo'shing.

$$\frac{4207}{30}-\frac{138\times 12+5}{12}$$

1656 hosil qilish uchun 138 va 12 ni ko'paytirish.

$$\frac{4207}{30}-\frac{1656+5}{12}$$

1661 olish uchun 1656 va 5'ni qo'shing.

$$\frac{4207}{30}-\frac{1661}{12}$$

30 va 12 ning eng kichik umumiy karralisi 60 ga teng. \frac{4207}{30} va \frac{1661}{12} ni 60 maxraj bilan kasrlarga aylantirib oling.

$$\frac{8414}{60}-\frac{8305}{60}$$

\frac{8414}{60} va \frac{8305}{60} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{8414-8305}{60}$$

109 olish uchun 8414 dan 8305 ni ayirish.

$$\frac{109}{60}$$

Omil

$$\frac{109}{2 ^ {2} \cdot 3 \cdot 5} = 1\frac{49}{60} = 1,8166666666666667$$