ПРОВЕДИ ДРОБИ К ОБЩЕМУ ЗНАМИНАТЕЛЮ. 1\6 И 1\8 , 1\30 И 1\40, 1\60 И 1\15, 8\17И 9\34
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1/6 и 1/8 = 4/24 и 3/24
1/30 и 1/40 = 4/120 и 3/120
1/60 и 1/15 = 1/60 и 4/60
8/17 и 9/34 = 16/34 и 9/34