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2/5:1/4 6:10 0.3:0.4 1.5:0.9 7.2:10.8 5/8:2 0.25:1 12:21求比值(要化简有过程)
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推荐答案 2012-10-16
乘以比的前项和后项分母的最小公被数,就行啦,自己多花些功夫,学习要努力!
2/5:1/4= (2/5)*20:(1/4)*20=8:5
6:10 =3:5(分子分母同时除以2,就是约分)
0.3:0.4 =3:4(分子分母同时乘以10)
其余的自己做
1.5:0.9 7.2:10.8 5/8:2 0.25:1 12:21
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