4(2div8)+4*5/4(6-1) eching

$$\frac { 4 ( 2 \div 8 ) + 4 \cdot 5 } { 4 ( 6 - 1 ) }$$

Baholash

$$\frac{21}{20}=1,05$$

Yechim qadamlari

\frac{2}{8} ulushini 2 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$\frac{4\times \frac{1}{4}+4\times 5}{4\left(6-1\right)}$$

4 va 4 ni qisqartiring.

$$\frac{1+4\times 5}{4\left(6-1\right)}$$

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

$$\frac{1+20}{4\left(6-1\right)}$$

21 olish uchun 1 va 20'ni qo'shing.

$$\frac{21}{4\left(6-1\right)}$$

5 olish uchun 6 dan 1 ni ayirish.

$$\frac{21}{4\times 5}$$

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

$$\frac{21}{20}$$

Omil

$$\frac{3 \cdot 7}{2 ^ {2} \cdot 5} = 1\frac{1}{20} = 1,05$$