this is question:
化簡下列各比
2份1:7=5:a=2b:56 係關於(比和率)中一課程
thx!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
問Maths
2007-03-10 4:37 am
回答 (3)
2007-03-10 4:41 am
✔ 最佳答案
化簡下列各比 1/2 : 7 = 5 : a = 2b : 56
1/2 : 7 = 5 : a
a/2 = 35
a = 70 //
1/2 : 7 = 2b : 56
2b/7 = 56/2
2b(7) = 28
2b = 4
b = 2 //
2007-03-09 20:42:24 補充：
樓上兩位計錯數呀~
參考: me~
2007-03-10 4:41 am
1:7=5:a=2b:56
5:35=5:35=2b=56
8:56=8:56=8:56
=1:7
a=35 b=4
5:35=5:35=2b=56
8:56=8:56=8:56
=1:7
a=35 b=4
收錄日期: 2021-04-12 23:41:45
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