1). 9/10 и 1/20 = 18/20 и 1/20;
2). 7/15 и 3/5 = 7/15 и 9/15;
3). 5/6 и 2/3 = 5/6 и 4/6;
4). 2/3 и 7/12 = 8/12 и 7/12;
5). 23/100 и 8/25 = 23/100 и 32/100;
6). 5/2 и 19/10 = 25/10 и 19/10;
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