Mathematics
Undergraduate
比の合成のやり方がよくわかりません。2枚目のような場合はなんとなく理解できるのですが、1枚目の場合はどうまとめればいいのでしょうか？特に数字のまとめ方が分かりません
A B C D
3:2
N-N
2
1
3: 2
:5
:
: 5 :
2
4
A: B: C
2:5
C
4:1
8:20:5
C
+till 8
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