(8)div(1+2+3+4+5+6+7) eching

$$( 8 ) \div ( 1 + 2 + 3 + 4 + 5 + 6 + 7 )$$

Baholash

$$\frac{2}{7}\approx 0,285714286$$

Yechim qadamlari

3 olish uchun 1 va 2'ni qo'shing.

$$\frac{8}{3+3+4+5+6+7}$$

6 olish uchun 3 va 3'ni qo'shing.

$$\frac{8}{6+4+5+6+7}$$

10 olish uchun 6 va 4'ni qo'shing.

$$\frac{8}{10+5+6+7}$$

15 olish uchun 10 va 5'ni qo'shing.

$$\frac{8}{15+6+7}$$

21 olish uchun 15 va 6'ni qo'shing.

$$\frac{8}{21+7}$$

28 olish uchun 21 va 7'ni qo'shing.

$$\frac{8}{28}$$

\frac{8}{28} ulushini 4 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$\frac{2}{7}$$

Omil

$$\frac{2}{7} = 0,2857142857142857$$