(5/10+2/10)-(5/10*1/10) eching

$$( \frac { 5 } { 10 } + \frac { 2 } { 10 } ) - ( \frac { 5 } { 10 } \times \frac { 1 } { 10 } )$$

Baholash

$$\frac{13}{20}=0,65$$

Yechim qadamlari

\frac{5}{10} va \frac{2}{10} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.

$$\frac{5+2}{10}-\frac{5}{10}\times \frac{1}{10}$$

7 olish uchun 5 va 2'ni qo'shing.

$$\frac{7}{10}-\frac{5}{10}\times \frac{1}{10}$$

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

$$\frac{7}{10}-\frac{1}{2}\times \frac{1}{10}$$

Suratni maxrajga va maxrajini suratga ko‘paytirish orqali \frac{1}{2} ni \frac{1}{10} ga ko‘paytiring.

$$\frac{7}{10}-\frac{1\times 1}{2\times 10}$$

\frac{1\times 1}{2\times 10} kasridagi ko‘paytirishlarni bajaring.

$$\frac{7}{10}-\frac{1}{20}$$

10 va 20 ning eng kichik umumiy karralisi 20 ga teng. \frac{7}{10} va \frac{1}{20} ni 20 maxraj bilan kasrlarga aylantirib oling.

$$\frac{14}{20}-\frac{1}{20}$$

\frac{14}{20} va \frac{1}{20} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{14-1}{20}$$

13 olish uchun 14 dan 1 ni ayirish.

$$\frac{13}{20}$$

Omil

$$\frac{13}{2 ^ {2} \cdot 5} = 0,65$$