1)1/6+0/47=0,16+0,47=0,63
2) 0,86-2/3=0,86-0,6=0,80
3)5,48+7/12-4.4/5=5,48+0,58-0,88=5,18
4)8.5/16-5.7/11+3,74=0,53-0,51+3,74=3,76
