01 Íàéäèòå çíà÷åíèå âûðàæåíèÿ  `+`(`/`(1, 2), -`/`(2, 5)). 

ÐÅØÅÍÈÅ 

 

1/2-2/5 

http://www.wolframalpha.com/input/?i=1%2F2-2%2F5 

ÎÒÂÅÒ 

0.1