51×5/17+51×11/17; 11/13×11/15+11/13×2/15; 22×7/11-22×6/11; 12/19×23/15-12/19×4/15;...

Question

51×5/17+51×11/17; 11/13×11/15+11/13×2/15; 22×7/11-22×6/11; 12/19×23/15-12/19×4/15; 11/21×5/14+17/21×5/14; 47/66×1/2-25/6×1/2

Answer 1

1) 25/16
2) 7/15
3) 10/32
4) 8/1

Comments

А остальные два примера?

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5) 35/1

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6) 4/2