89/10-42/5 eching

$$8 \frac { 9 } { 10 } - 4 \frac { 2 } { 5 }$$

Baholash

$$\frac{9}{2}=4,5$$

Yechim qadamlari

80 hosil qilish uchun 8 va 10 ni ko'paytirish.

$$\frac{80+9}{10}-\frac{4\times 5+2}{5}$$

89 olish uchun 80 va 9'ni qo'shing.

$$\frac{89}{10}-\frac{4\times 5+2}{5}$$

20 hosil qilish uchun 4 va 5 ni ko'paytirish.

$$\frac{89}{10}-\frac{20+2}{5}$$

22 olish uchun 20 va 2'ni qo'shing.

$$\frac{89}{10}-\frac{22}{5}$$

10 va 5 ning eng kichik umumiy karralisi 10 ga teng. \frac{89}{10} va \frac{22}{5} ni 10 maxraj bilan kasrlarga aylantirib oling.

$$\frac{89}{10}-\frac{44}{10}$$

\frac{89}{10} va \frac{44}{10} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{89-44}{10}$$

45 olish uchun 89 dan 44 ni ayirish.

$$\frac{45}{10}$$

\frac{45}{10} ulushini 5 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$\frac{9}{2}$$

Omil

$$\frac{3 ^ {2}}{2} = 4\frac{1}{2} = 4,5$$