4*5-(-6)div4 eching

$$4 \times 5-(-6) \div 4$$

Baholash

$$\frac{43}{2}=21,5$$

Yechim qadamlari

20 hosil qilish uchun 4 va 5 ni ko'paytirish.

$$20-\frac{-6}{4}$$

\frac{-6}{4} ulushini 2 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$20-\left(-\frac{3}{2}\right)$$

-\frac{3}{2} ning teskarisi \frac{3}{2} ga teng.

$$20+\frac{3}{2}$$

20 ni \frac{40}{2} kasrga o‘giring.

$$\frac{40}{2}+\frac{3}{2}$$

\frac{40}{2} va \frac{3}{2} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.

$$\frac{40+3}{2}$$

43 olish uchun 40 va 3'ni qo'shing.

$$\frac{43}{2}$$

Omil

$$\frac{43}{2} = 21\frac{1}{2} = 21,5$$