12/15-1/12 eching

$$1 \frac { 2 } { 15 } - \frac { 1 } { 12 }$$

Baholash

$$\frac{21}{20}=1,05$$

Yechim qadamlari

15 hosil qilish uchun 1 va 15 ni ko'paytirish.

$$\frac{15+2}{15}-\frac{1}{12}$$

17 olish uchun 15 va 2'ni qo'shing.

$$\frac{17}{15}-\frac{1}{12}$$

15 va 12 ning eng kichik umumiy karralisi 60 ga teng. \frac{17}{15} va \frac{1}{12} ni 60 maxraj bilan kasrlarga aylantirib oling.

$$\frac{68}{60}-\frac{5}{60}$$

\frac{68}{60} va \frac{5}{60} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{68-5}{60}$$

63 olish uchun 68 dan 5 ni ayirish.

$$\frac{63}{60}$$

\frac{63}{60} ulushini 3 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$\frac{21}{20}$$

Omil

$$\frac{3 \cdot 7}{2 ^ {2} \cdot 5} = 1\frac{1}{20} = 1,05$$