Вправи: 374

374. Запишіть у вигляді многочлена вираз:

1) abc – ab = 100a + 10b + c – 10a – b = 90a + 9b + c;

2) abc + ab = 100a + 10b + c + 10a + b = 110a + 11b + c;

3) abc – ab + acb = 100a + 10b + c – 10a – b + 100a + 10c + b = 190a + 10b + 10c;

4) abc + ab – acb = 100a + 10b + c + 10a + b – 100a – 10c – b = 10a + 10b – 9c;

5) abc + acb + bас = 100a + 10b + c + 100a + 10c + b + 100b + 10a + c = 210a + 111b + 12c;

6) abc – acb – bас = 100a + 10b + c – 100a – 10c – b – 100b – 10a – c = –10a – 91b – 10c.