1. Где ошибка?

а) 2 + 0 + 0 + 5 = 5 + 0 + 0 + 2;

б) 2 – (0 – 0 – 5) = 2 + (0 + 0) + 5;

в) 2 + (0 + 0 + 5) = (2 + 0 + 0) + 5;

г) 2 + 0 – 0 + 5 = 5 – 0 – 0 – 2;
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