Автор - artchannel126

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Ответ

Автор - ChocolateBunny
1) 3/4-1/4=2/4=1/2;
2) 5/8+3/8=8/8=1;
3) 7/12-5/12= 2/12= 1/6;
4) 8/15+2/15=10/15;
5) 3/10+1/10=4/10= 2/5;
6) 17/25-12/25=5/25= 1/5;
7) 1/30+7/30= 8/30;
8) 28/45-13/45= 15/45=3/9= 1/3.

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