两个外项分别是
(37+13)/2 = 25
(37-13)/2 = 12
则
12×(5/12) = 5
25÷(5/12) = 60
比例就是
12:5 = 60 :25
或
25×(5/12) = 125/12
12÷(5/12) = 144/5
比例式就是
25:(125/12) = (144/5) :12
两个外项分别是
(37+13)/2 = 25
(37-13)/2 = 12
则
12×(5/12) = 5
25÷(5/12) = 60
比例就是
12:5 = 60 :25
或
25×(5/12) = 125/12
12÷(5/12) = 144/5
比例式就是
25:(125/12) = (144/5) :12