20*[1-(1+15%)-5)]/15% eching

$$20 \times [ 1 - ( 1 + 15 \% ) - 5 ) ] / 15 \%$$

Baholash

$$-103$$

Yechim qadamlari

\frac{15}{100} ulushini 5 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$20\left(1-\left(1+\frac{3}{20}\right)-5\right)$$

1 ni \frac{20}{20} kasrga o‘giring.

$$20\left(1-\left(\frac{20}{20}+\frac{3}{20}\right)-5\right)$$

\frac{20}{20} va \frac{3}{20} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.

$$20\left(1-\frac{20+3}{20}-5\right)$$

23 olish uchun 20 va 3'ni qo'shing.

$$20\left(1-\frac{23}{20}-5\right)$$

1 ni \frac{20}{20} kasrga o‘giring.

$$20\left(\frac{20}{20}-\frac{23}{20}-5\right)$$

\frac{20}{20} va \frac{23}{20} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$20\left(\frac{20-23}{20}-5\right)$$

-3 olish uchun 20 dan 23 ni ayirish.

$$20\left(-\frac{3}{20}-5\right)$$

5 ni \frac{100}{20} kasrga o‘giring.

$$20\left(-\frac{3}{20}-\frac{100}{20}\right)$$

-\frac{3}{20} va \frac{100}{20} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$20\times \frac{-3-100}{20}$$

-103 olish uchun -3 dan 100 ni ayirish.

$$20\left(-\frac{103}{20}\right)$$

20 va 20 ni qisqartiring.

$$-103$$

Omil

$$-103$$