1/4+1-1/2-2/5= eching

$$\frac{ 1 }{ 4 } +1- \frac{ 1 }{ 2 } - \frac{ 2 }{ 5 } =$$

Baholash

$$\frac{7}{20}=0,35$$

Yechim qadamlari

1 ni \frac{4}{4} kasrga o‘giring.

$$\frac{1}{4}+\frac{4}{4}-\frac{1}{2}-\frac{2}{5}$$

\frac{1}{4} va \frac{4}{4} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.

$$\frac{1+4}{4}-\frac{1}{2}-\frac{2}{5}$$

5 olish uchun 1 va 4'ni qo'shing.

$$\frac{5}{4}-\frac{1}{2}-\frac{2}{5}$$

4 va 2 ning eng kichik umumiy karralisi 4 ga teng. \frac{5}{4} va \frac{1}{2} ni 4 maxraj bilan kasrlarga aylantirib oling.

$$\frac{5}{4}-\frac{2}{4}-\frac{2}{5}$$

\frac{5}{4} va \frac{2}{4} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{5-2}{4}-\frac{2}{5}$$

3 olish uchun 5 dan 2 ni ayirish.

$$\frac{3}{4}-\frac{2}{5}$$

4 va 5 ning eng kichik umumiy karralisi 20 ga teng. \frac{3}{4} va \frac{2}{5} ni 20 maxraj bilan kasrlarga aylantirib oling.

$$\frac{15}{20}-\frac{8}{20}$$

\frac{15}{20} va \frac{8}{20} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{15-8}{20}$$

7 olish uchun 15 dan 8 ni ayirish.

$$\frac{7}{20}$$

Omil

$$\frac{7}{2 ^ {2} \cdot 5} = 0,35$$