990/1000*989/999 eching

$$\frac{ 990 }{ 1000 } \times \frac{ 989 }{ 999 }$$

Baholash

$$\frac{10879}{11100}\approx 0,98009009$$

Yechim qadamlari

\frac{990}{1000} ulushini 10 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$\frac{99}{100}\times \frac{989}{999}$$

Suratni maxrajga va maxrajini suratga ko‘paytirish orqali \frac{99}{100} ni \frac{989}{999} ga ko‘paytiring.

$$\frac{99\times 989}{100\times 999}$$

\frac{99\times 989}{100\times 999} kasridagi ko‘paytirishlarni bajaring.

$$\frac{97911}{99900}$$

\frac{97911}{99900} ulushini 9 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$\frac{10879}{11100}$$

Omil

$$\frac{11 \cdot 23 \cdot 43}{2 ^ {2} \cdot 3 \cdot 5 ^ {2} \cdot 37} = 0,9800900900900901$$