Номер 1275
| 1) (– | 2 | + 3 | 1 | + | 1 | ) · 18 = – | 2 | · 18 + | 55 | · 18 + | 1 | · 18 = –4 + 55 + 9 = 60; |
| 9 | 18 | 2 | 9 | 18 | 2 |
| 2) (– | 3 | + 1 | 1 | – 1) · (–7,5) = (– | 3 | + | 4 | – 1) · (–7 | 1 | ) = |
| 25 | 3 | 25 | 3 | 2 |
| = (– | 3 | ) · (– | 15 | ) + | 4 | · (– | 15 | ) + | 15 | = | 9 | – 10 + | 15 | = ( | 9 | + | 14 | ) – 10 = –1,6; |
| 25 | 2 | 3 | 2 | 2 | 10 | 2 | 10 | 2 |
| 3) | –12 · 1 | 3 | + (–12) · 2 | 1 | = –12 · (1 | 3 | + 2 | 1 | ) = –12 · 4 | 1 | = –12 · | 49 | = –49; |
| 4 | 3 | 4 | 3 | 12 | 12 |
| 4) –2 | 1 | · 13 + 3 | 1 | · 13 + 13 = 13 · (–2 | 1 | + 3 | 1 | + 1) = 13 · (1 + 1) = 13 · 2 = 26. |
| 9 | 9 | 9 | 9 |