(-7/15)+(14/19+7/15)= eching

$$( - \frac { 7 } { 15 } ) + ( \frac { 14 } { 19 } + \frac { 7 } { 15 } ) =$$

Baholash

$$\frac{14}{19}\approx 0,736842105$$

Yechim qadamlari

15 va 19 ning eng kichik umumiy karralisi 285 ga teng. -\frac{7}{15} va \frac{14}{19} ni 285 maxraj bilan kasrlarga aylantirib oling.

$$-\frac{133}{285}+\frac{210}{285}+\frac{7}{15}$$

-\frac{133}{285} va \frac{210}{285} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.

$$\frac{-133+210}{285}+\frac{7}{15}$$

77 olish uchun -133 va 210'ni qo'shing.

$$\frac{77}{285}+\frac{7}{15}$$

285 va 15 ning eng kichik umumiy karralisi 285 ga teng. \frac{77}{285} va \frac{7}{15} ni 285 maxraj bilan kasrlarga aylantirib oling.

$$\frac{77}{285}+\frac{133}{285}$$

\frac{77}{285} va \frac{133}{285} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.

$$\frac{77+133}{285}$$

210 olish uchun 77 va 133'ni qo'shing.

$$\frac{210}{285}$$

\frac{210}{285} ulushini 15 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$\frac{14}{19}$$

Omil

$$\frac{2 \cdot 7}{19} = 0,7368421052631579$$