1-2/7-1/4 eching

$$1 - \frac { 2 } { 7 } - \frac { 1 } { 4 }$$

Baholash

$$\frac{13}{28}\approx 0,464285714$$

Yechim qadamlari

1 ni \frac{7}{7} kasrga o‘giring.

$$\frac{7}{7}-\frac{2}{7}-\frac{1}{4}$$

\frac{7}{7} va \frac{2}{7} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{7-2}{7}-\frac{1}{4}$$

5 olish uchun 7 dan 2 ni ayirish.

$$\frac{5}{7}-\frac{1}{4}$$

7 va 4 ning eng kichik umumiy karralisi 28 ga teng. \frac{5}{7} va \frac{1}{4} ni 28 maxraj bilan kasrlarga aylantirib oling.

$$\frac{20}{28}-\frac{7}{28}$$

\frac{20}{28} va \frac{7}{28} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{20-7}{28}$$

13 olish uchun 20 dan 7 ni ayirish.

$$\frac{13}{28}$$

Omil

$$\frac{13}{2 ^ {2} \cdot 7} = 0,4642857142857143$$