5/13*(8/17)+15/17*(-12/13)= eching

$$\frac{ 5 }{ 13 } \times ( \frac{ 8 }{ 17 } )+ \frac{ 15 }{ 17 } \times (- \frac{ 12 }{ 13 } )=$$

Baholash

$$-\frac{140}{221}\approx -0,633484163$$

Yechim qadamlari

Suratni maxrajga va maxrajini suratga ko‘paytirish orqali \frac{5}{13} ni \frac{8}{17} ga ko‘paytiring.

$$\frac{5\times 8}{13\times 17}+\frac{15}{17}\left(-\frac{12}{13}\right)$$

\frac{5\times 8}{13\times 17} kasridagi ko‘paytirishlarni bajaring.

$$\frac{40}{221}+\frac{15}{17}\left(-\frac{12}{13}\right)$$

Suratni maxrajga va maxrajini suratga ko‘paytirish orqali \frac{15}{17} ni -\frac{12}{13} ga ko‘paytiring.

$$\frac{40}{221}+\frac{15\left(-12\right)}{17\times 13}$$

\frac{15\left(-12\right)}{17\times 13} kasridagi ko‘paytirishlarni bajaring.

$$\frac{40}{221}+\frac{-180}{221}$$

\frac{-180}{221} kasri manfiy belgini olib tashlash bilan -\frac{180}{221} sifatida qayta yozilishi mumkin.

$$\frac{40}{221}-\frac{180}{221}$$

\frac{40}{221} va \frac{180}{221} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{40-180}{221}$$

-140 olish uchun 40 dan 180 ni ayirish.

$$-\frac{140}{221}$$

Omil

$$-\frac{140}{221} = -0,6334841628959276$$