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0.4:0.12 2/3:0.8 4/7:5/12化简比(要过程)
人气:316 ℃ 时间:2019-11-20 22:45:07
解答
0.4:0.12
=40:12
=10:3
2/3:0.8
=2/3:4/5
=10:12
=5:6
4/7:5/12
=4/7x12/5
=48:35
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