解:30.5÷0.24 = (30 × 10 + 5)/10 ÷ 24/100 = 305/10 ÷ 24/100 = 305/10 × 100/24 = 3050/100 × 100/24 = 3050/24 = 1525/12 = 127.0833333≈ 127.08 经检验,30.5÷0.24 ≈ 127.08符合题意
24÷0.5=240 ÷ 5 = 48