(1)14.15-4.75+1.85-2.25 =14.15+1.85-4.75-2.25 =(14.15+1.85)-(4.75+2.25) =16-7 =9 (2)75.8-(15.3+5.8) =75.8-15.3-5.8 =75.8-5.8-15.3 =70-15.3 =54.7 (3)18.917-(4.917+5.73) =18.917-4.917-5.73 =14-5.73 =8.27 (4)14.7+5.9-14.7+5.9 =(14.7-14.7)+(5.9+5.9) =0+11.8 =11.8 (5)58.92-15.5-18.92-4.5 =(58.92-18.92)-(15.5+4.5) =40-20 =20 (6)23.4-8.54-1.46 =23.4-(8.54+1.46) =23.4-10 =13.4