求比值 16:20 2:1/4 1.5m:40dm

Question

求比值 16:20 2:1/4 1.5m:40dm 1/3:0.5 4.2:2.8 2/3:3/4 1:1.25 1/20:1/16 (写出步骤)谢谢你了

Answer 1

16:20=4:5
2:1/4 =8:1 1.5m:40dm=15:40=3:8 1/3:0.5=1:1.5=2:3 4.2:2.8=42:48=7:8 2/3:3/4=8/12:9/12=8:9 1:1.25=4:5 1/20:1/16=1/5:1/4=4:5追问

是比值，前项除以后项

在吗？

追答

16:20=4:5=0.8
2:1/4 =8:1=8 1.5m:40dm=15:40=3:8=0.375 1/3:0.5=1:1.5=2:3 =0.667 4.2:2.8=42:48=7:8 =0.875 2/3:3/4=8/12:9/12=8:9=0.9
1:1.25=4:5 =0.8 1/20:1/16=1/5:1/4=4:5=0.8

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