求比值 5:25 8:30 8:16 12:15 18:9 0.6:1/5

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求比值5:258:308:1612:1518:90.6:1/5求比值5:258:308:1612:1518:90.6:1/5求比值5:258:308:1612:1518:90.6:1/5①5:25=5

求比值 5:25 8:30 8:16 12:15 18:9 0.6:1/5
求比值 5:25 8:30 8:16 12:15 18:9 0.6:1/5

求比值 5:25 8:30 8:16 12:15 18:9 0.6:1/5
①5:25=5:(5*5)=1:5=0.2
②8:30=(2*4):(2*15)=4:15=4/15
③8:16=8:(2*8)=1:2=0.5
④12:15=(3*4):(3*5)=4:5=0.8
⑤18:9=(2*9):9=2:1=2
⑥0.6:(1/5)=0.6:0.2=6:2=3:1=3

1 5:25=5:(5*5)=1:5=0.2
2 8:30=(2*4):(2*15)=4:15=4/15
3 8:16=8:(2*8)=1:2=0.5
④12:15=(3*4):(3*5)=4:5=0.8
⑤18:9=(2*9):9=2:1=2
⑥0.6:(1/5)=0.6:0.2=6:2=3:1=3