72/3-21/5 eching

$$7 \frac { 2 } { 3 } - 2 \frac { 1 } { 5 }$$

Baholash

$$\frac{82}{15}\approx 5,466666667$$

Yechim qadamlari

21 hosil qilish uchun 7 va 3 ni ko'paytirish.

$$\frac{21+2}{3}-\frac{2\times 5+1}{5}$$

23 olish uchun 21 va 2'ni qo'shing.

$$\frac{23}{3}-\frac{2\times 5+1}{5}$$

10 hosil qilish uchun 2 va 5 ni ko'paytirish.

$$\frac{23}{3}-\frac{10+1}{5}$$

11 olish uchun 10 va 1'ni qo'shing.

$$\frac{23}{3}-\frac{11}{5}$$

3 va 5 ning eng kichik umumiy karralisi 15 ga teng. \frac{23}{3} va \frac{11}{5} ni 15 maxraj bilan kasrlarga aylantirib oling.

$$\frac{115}{15}-\frac{33}{15}$$

\frac{115}{15} va \frac{33}{15} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{115-33}{15}$$

82 olish uchun 115 dan 33 ni ayirish.

$$\frac{82}{15}$$

Omil

$$\frac{2 \cdot 41}{3 \cdot 5} = 5\frac{7}{15} = 5,466666666666667$$