a) 3-15-5 =-12-5=-17
b) -7+11-6 =4-6=-2
c) 5-(-12)-7+14 =5+12-7+14=17-7+14=10+14=24
d)-2-(-8)-6-3 =-2+8-6-3=6-6-3=-3
e) 1,6-2 1/6-1 =16/10-13/6-1=8/5-13/6-1=48/30-65/30-1=-17/30-1=
=-17/30-30/30=-47/30=-1 17/30
f) -3 1/4 +2,75-0,6 =-3,25+2,75-0,6=-0,5-0,6=-1,1
