Можно и так.
315-148+185=352
315-2013+185=287
б) 427-59-17=201
427-260-167=0
(380 : 400) x 100 = 95% в 1-ю смену
(350 : 400) х 100 = 88% во 2-ю смену
<span>71510:5+560*2=</span>14302+1120=15422
1) 5+5/2= 5/1+5/2= 10/2+5/2=15/2
2) 12/5+9/1= 12/5+45/5=57/5
3) 18/7+3/7+3= 21/7+3/1= 21/7+21/7= 42/7= 6