7/8+1/9-7/2 eching

$$\frac{ 7 }{ 8 } + \frac{ 1 }{ 9 } - \frac{ 7 }{ 2 }$$

Baholash

$$-\frac{181}{72}\approx -2,513888889$$

Yechim qadamlari

8 va 9 ning eng kichik umumiy karralisi 72 ga teng. \frac{7}{8} va \frac{1}{9} ni 72 maxraj bilan kasrlarga aylantirib oling.

$$\frac{63}{72}+\frac{8}{72}-\frac{7}{2}$$

\frac{63}{72} va \frac{8}{72} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.

$$\frac{63+8}{72}-\frac{7}{2}$$

71 olish uchun 63 va 8'ni qo'shing.

$$\frac{71}{72}-\frac{7}{2}$$

72 va 2 ning eng kichik umumiy karralisi 72 ga teng. \frac{71}{72} va \frac{7}{2} ni 72 maxraj bilan kasrlarga aylantirib oling.

$$\frac{71}{72}-\frac{252}{72}$$

\frac{71}{72} va \frac{252}{72} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{71-252}{72}$$

-181 olish uchun 71 dan 252 ni ayirish.

$$-\frac{181}{72}$$

Omil

$$-\frac{181}{72} = -2\frac{37}{72} = -2,513888888888889$$