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3) 4/20 = 1/5 6) 10/20 = 1/2 9) 4/72 = 1/18 12) 2/48 = 1/24
спс
3) 4/20 = 0.2
6) 10/20 = 0.5
9) 4/72 = 1/18
12) 2/48 = 1/24