(3/4:6/5-7)*9/2= eching

$$( \frac { 3 } { 4 } : \frac { 6 } { 5 } - 7 ) \cdot \frac { 9 } { 2 } =$$

Baholash

$$-\frac{459}{16}=-28,6875$$

Yechim qadamlari

\frac{3}{4} ni \frac{6}{5} ga bo'lish \frac{3}{4} ga k'paytirish \frac{6}{5} ga qaytarish.

$$\left(\frac{3}{4}\times \frac{5}{6}-7\right)\times \frac{9}{2}$$

Suratni maxrajga va maxrajini suratga ko‘paytirish orqali \frac{3}{4} ni \frac{5}{6} ga ko‘paytiring.

$$\left(\frac{3\times 5}{4\times 6}-7\right)\times \frac{9}{2}$$

\frac{3\times 5}{4\times 6} kasridagi ko‘paytirishlarni bajaring.

$$\left(\frac{15}{24}-7\right)\times \frac{9}{2}$$

\frac{15}{24} ulushini 3 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$\left(\frac{5}{8}-7\right)\times \frac{9}{2}$$

7 ni \frac{56}{8} kasrga o‘giring.

$$\left(\frac{5}{8}-\frac{56}{8}\right)\times \frac{9}{2}$$

\frac{5}{8} va \frac{56}{8} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{5-56}{8}\times \frac{9}{2}$$

-51 olish uchun 5 dan 56 ni ayirish.

$$-\frac{51}{8}\times \frac{9}{2}$$

Suratni maxrajga va maxrajini suratga ko‘paytirish orqali -\frac{51}{8} ni \frac{9}{2} ga ko‘paytiring.

$$\frac{-51\times 9}{8\times 2}$$

\frac{-51\times 9}{8\times 2} kasridagi ko‘paytirishlarni bajaring.

$$\frac{-459}{16}$$

\frac{-459}{16} kasri manfiy belgini olib tashlash bilan -\frac{459}{16} sifatida qayta yozilishi mumkin.

$$-\frac{459}{16}$$

Omil

$$-\frac{459}{16} = -28\frac{11}{16} = -28,6875$$