-61/16+31/80 eching

$$- \frac { 61 } { 16 } + \frac { 31 } { 80 }$$

Baholash

$$-\frac{137}{40}=-3,425$$

Yechim qadamlari

16 va 80 ning eng kichik umumiy karralisi 80 ga teng. -\frac{61}{16} va \frac{31}{80} ni 80 maxraj bilan kasrlarga aylantirib oling.

$$-\frac{305}{80}+\frac{31}{80}$$

-\frac{305}{80} va \frac{31}{80} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.

$$\frac{-305+31}{80}$$

-274 olish uchun -305 va 31'ni qo'shing.

$$\frac{-274}{80}$$

\frac{-274}{80} ulushini 2 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$-\frac{137}{40}$$

Omil

$$-\frac{137}{40} = -3\frac{17}{40} = -3,425$$