算願:比を簡単にしよう1 なまえ . 20 : 8 =
25 : 5 = 12 : 4 = 15 : 25 = 8 : 12 = 15 : 10 = 15 : 3 = 4 : 12 = 25 : 20 = 2 : 4 = 8 : 20 = 6 : 2 = 6 : 12 = 4 : 16 = 5 : 25 = 8 : 4 = 6 : 8 = 20 : 12 = 6 : 15 = 4 : 6 = 8 : 4 = 5 : 20 = 9 : 6 = 8 : 12 = 10 : 8 =
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