80left(25*30-10*15right)/40*40*45*35= eching

$$\frac{ 80 \left( 25 \cdot 30-10 \cdot 15 \right) }{ 40 \cdot 40 \cdot 45 \cdot 35 } =$$

Baholash

$$\frac{2}{105}\approx 0,019047619$$

Yechim qadamlari

Surat va maxrajdagi ikkala 2\times 40 ni qisqartiring.

$$\frac{25\times 30-10\times 15}{20\times 35\times 45}$$

750 hosil qilish uchun 25 va 30 ni ko'paytirish.

$$\frac{750-10\times 15}{20\times 35\times 45}$$

150 hosil qilish uchun 10 va 15 ni ko'paytirish.

$$\frac{750-150}{20\times 35\times 45}$$

600 olish uchun 750 dan 150 ni ayirish.

$$\frac{600}{20\times 35\times 45}$$

700 hosil qilish uchun 20 va 35 ni ko'paytirish.

$$\frac{600}{700\times 45}$$

31500 hosil qilish uchun 700 va 45 ni ko'paytirish.

$$\frac{600}{31500}$$

\frac{600}{31500} ulushini 300 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$\frac{2}{105}$$

Omil

$$\frac{2}{3 \cdot 5 \cdot 7} = 0,01904761904761905$$