+(-21/2)+(+1/2)-(-13/7) eching

$$+ ( - 2 \frac { 1 } { 2 } ) + ( + \frac { 1 } { 2 } ) - ( - 1 \frac { 3 } { 7 } )$$

Baholash

$$-\frac{4}{7}\approx -0,571428571$$

Yechim qadamlari

4 hosil qilish uchun 2 va 2 ni ko'paytirish.

$$-\frac{4+1}{2}+\frac{1}{2}-\left(-\frac{1\times 7+3}{7}\right)$$

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

$$-\frac{5}{2}+\frac{1}{2}-\left(-\frac{1\times 7+3}{7}\right)$$

-\frac{5}{2} va \frac{1}{2} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.

$$\frac{-5+1}{2}-\left(-\frac{1\times 7+3}{7}\right)$$

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

$$\frac{-4}{2}-\left(-\frac{1\times 7+3}{7}\right)$$

-2 ni olish uchun -4 ni 2 ga bo‘ling.

$$-2-\left(-\frac{1\times 7+3}{7}\right)$$

7 hosil qilish uchun 1 va 7 ni ko'paytirish.

$$-2-\left(-\frac{7+3}{7}\right)$$

10 olish uchun 7 va 3'ni qo'shing.

$$-2-\left(-\frac{10}{7}\right)$$

-\frac{10}{7} ning teskarisi \frac{10}{7} ga teng.

$$-2+\frac{10}{7}$$

-2 ni -\frac{14}{7} kasrga o‘giring.

$$-\frac{14}{7}+\frac{10}{7}$$

-\frac{14}{7} va \frac{10}{7} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.

$$\frac{-14+10}{7}$$

-4 olish uchun -14 va 10'ni qo'shing.

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

Omil

$$-\frac{4}{7} = -0,5714285714285714$$