解几个题2:3=3:4.5 2/1:4/1=4/1:8/1 0.25:0.5=24:48 0.25/1.25=0.8/4 5/3:5/1=7/3:7/1 4:6=12:18 8/3=24/9 25/0.4=75/1.2例如:2/1 =二分之一是把比例式变成等积式.对不起,我忘写了!
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![解几个题2:3=3:4.5 2/1:4/1=4/1:8/1 0.25:0.5=24:48 0.25/1.25=0.8/4 5/3:5/1=7/3:7/1 4:6=12:18 8/3=24/9 25/0.4=75/1.2例如:2/1 =二分之一是把比例式变成等积式.对不起,我忘写了!](/uploads/image/z/15247160-8-0.jpg?t=%E8%A7%A3%E5%87%A0%E4%B8%AA%E9%A2%982%3A3%3D3%3A4.5+2%2F1%3A4%2F1%3D4%2F1%3A8%2F1+0.25%3A0.5%3D24%3A48+0.25%2F1.25%3D0.8%2F4+5%2F3%3A5%2F1%3D7%2F3%3A7%2F1+4%3A6%3D12%3A18+8%2F3%3D24%2F9+25%2F0.4%3D75%2F1.2%E4%BE%8B%E5%A6%82%EF%BC%9A2%2F1+%3D%E4%BA%8C%E5%88%86%E4%B9%8B%E4%B8%80%E6%98%AF%E6%8A%8A%E6%AF%94%E4%BE%8B%E5%BC%8F%E5%8F%98%E6%88%90%E7%AD%89%E7%A7%AF%E5%BC%8F.%E5%AF%B9%E4%B8%8D%E8%B5%B7%2C%E6%88%91%E5%BF%98%E5%86%99%E4%BA%86%21)
解几个题2:3=3:4.5 2/1:4/1=4/1:8/1 0.25:0.5=24:48 0.25/1.25=0.8/4 5/3:5/1=7/3:7/1 4:6=12:18 8/3=24/9 25/0.4=75/1.2例如:2/1 =二分之一是把比例式变成等积式.对不起,我忘写了!
解几个题
2:3=3:4.5 2/1:4/1=4/1:8/1 0.25:0.5=24:48 0.25/1.25=0.8/4 5/3:5/1=7/3:7/1 4:6=12:18 8/3=24/9 25/0.4=75/1.2
例如:2/1 =二分之一
是把比例式变成等积式.对不起,我忘写了!
解几个题2:3=3:4.5 2/1:4/1=4/1:8/1 0.25:0.5=24:48 0.25/1.25=0.8/4 5/3:5/1=7/3:7/1 4:6=12:18 8/3=24/9 25/0.4=75/1.2例如:2/1 =二分之一是把比例式变成等积式.对不起,我忘写了!
两内项之积等于两外项之积.自己算一下就好了.懒得写.