7.2:1.8=():() 2:1/8=():() 3吨:720千克=():() 40分:2时=():() 450km:9m=():()

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7.2:1.8=():() 2:1/8=():() 3吨:720千克=():() 40分:2时=():() 450km:9m=():()
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7.2:1.8=():() 2:1/8=():() 3吨:720千克=():() 40分:2时=():() 450km:9m=():()
7.2:1.8=():() 2:1/8=():() 3吨:720千克=():() 40分:2时=():() 450km:9m=():()

7.2:1.8=():() 2:1/8=():() 3吨:720千克=():() 40分:2时=():() 450km:9m=():()
7.2:1.8=(4):(1)
2:1/8=(16):(1)
3吨:720千克=(10):(3)
40分:2时=(1):(3)
450km:9m=(50000):(1)

7.2:1.8=(4):(1) 2:1/8=(16):(1) 3吨:720千克=(25):(6) 40分:2时=(1):(3) 450km:9m=(50000):(1)

答案依次是
4,1
16,,1
25,,6
1,3
50000,1