vmaluga2011 3 3/8:1/8-1 5/14*7=-11
1) 3 3/8:1/8=27/8:1/8=27
2)1 5/14*7=19/14*7=38
3)27-38=-11

или
3 3/8:1/8-1 5/14*7=27/8:1/8-19/14*7=27-38=-11

ОтличникАнатолий 25 - 9,5 = 15,5............................