03 Íàéäèòå çíà÷åíèå âûðàæåíèÿ .
ÐÅØÅÍÈÅ
(3.1-5.7)/(2.5)
http://www.wolframalpha.com/input/?i=%283.1-5.7%29%2F%282.5%29
=
ÎÒÂÅÒ
-1.04