5.9×1.4+59×0.33 =5.9×1.4+5.9×3.3 =5.9×(1.4+3.3) =5.9×4.7 =(6-0.1)×(5-0.3) =30-1.8-0.5+0.03 =(30+0.03)-(1.8+0.5) =30.03-2.3 = 27.73
