求比值.60:42,4.8:7.5,3/8:9/20,3.5:8又2/5
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求比值.60:42,4.8:7.5,3/8:9/20,3.5:8又2/5求比值.60:42,4.8:7.5,3/8:9/20,3.5:8又2/5求比值.60:42,4.8:7.5,3/8:9/20,3
求比值.60:42,4.8:7.5,3/8:9/20,3.5:8又2/5
求比值.60:42,4.8:7.5,3/8:9/20,3.5:8又2/5
求比值.60:42,4.8:7.5,3/8:9/20,3.5:8又2/5
60:42=10:7=10/7=1.4285
4.8:7.5=16:25=0.64
3/8:9/20=1/8:3/20=20/24=5/6=0.833
3.5:8又2/5=35:84=5:12=5/12=0.417