4*3*7+4*5*6*2+5*4*5/9*8*(4+5+2) eching

$$\frac { 4 \times 3 \times 7 + 4 \times 5 \times 6 \times 2 + 5 \times 4 \times 5 } { 9 \times 8 \times ( 4 + 5 + 2 ) }$$

Baholash

$$\frac{53}{99}\approx 0,535353535$$

Yechim qadamlari

12 hosil qilish uchun 4 va 3 ni ko'paytirish. 20 hosil qilish uchun 4 va 5 ni ko'paytirish. 20 hosil qilish uchun 5 va 4 ni ko'paytirish.

$$\frac{12\times 7+20\times 6\times 2+20\times 5}{9\times 8\left(4+5+2\right)}$$

84 hosil qilish uchun 12 va 7 ni ko'paytirish.

$$\frac{84+20\times 6\times 2+20\times 5}{9\times 8\left(4+5+2\right)}$$

120 hosil qilish uchun 20 va 6 ni ko'paytirish.

$$\frac{84+120\times 2+20\times 5}{9\times 8\left(4+5+2\right)}$$

240 hosil qilish uchun 120 va 2 ni ko'paytirish.

$$\frac{84+240+20\times 5}{9\times 8\left(4+5+2\right)}$$

324 olish uchun 84 va 240'ni qo'shing.

$$\frac{324+20\times 5}{9\times 8\left(4+5+2\right)}$$

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

$$\frac{324+100}{9\times 8\left(4+5+2\right)}$$

424 olish uchun 324 va 100'ni qo'shing.

$$\frac{424}{9\times 8\left(4+5+2\right)}$$

72 hosil qilish uchun 9 va 8 ni ko'paytirish.

$$\frac{424}{72\left(4+5+2\right)}$$

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

$$\frac{424}{72\left(9+2\right)}$$

11 olish uchun 9 va 2'ni qo'shing.

$$\frac{424}{72\times 11}$$

792 hosil qilish uchun 72 va 11 ni ko'paytirish.

$$\frac{424}{792}$$

\frac{424}{792} ulushini 8 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$\frac{53}{99}$$

Omil

$$\frac{53}{3 ^ {2} \cdot 11} = 0,5353535353535354$$