1) 25 / 18-4/15 = (25*15-4*18) / 18*15 = (375-72) / 270=303/270=1 33/270=1 11/90
2) 24/5*25/6=20
3) 28/9:14/3=28/9*3/14=2/3
1) 25 / 18-4/15 = (25*15-4*18) / 18*15 = (375-72) / 270=303/270=1 33/270=1 11/90
2) 24/5*25/6=20
3) 28/9:14/3=28/9*3/14=2/3