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求出下面的比值1比0.25 16分之9比4分之3 39比91
人气:177 ℃ 时间:2019-11-10 13:16:04
解答
1:0.25
=1:1/4
=1÷1/4
=1×4
=4
9/16:3/4
=9/16÷3/4
=9/16×4/3
=3/4
39:91
=(39÷13):(91÷13)
=3:7
=3/7
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