Номер 1219
Виконай дії:
| 1) – | 7 | · 1 | 4 | – (– | 4 | ) · (–1 | 1 | ) = – | 7 | · | 11 | – (– | 4 | ) · (– | 7 | ) = – | 11 | – | 2 | = –( | 11 | + | 4 | ) = – | 15 | = – | 5 | ; |
| 18 | 7 | 21 | 6 | 18 | 7 | 21 | 6 | 18 | 9 | 18 | 18 | 18 | 6 |
| 2) (1 | 7 | · (–1 | 4 | ) + | 9 | ) · (– | 8 | ) = | 15 | · (– | 9 | ) + | 9 | ) · (– | 8 | ) = (– | 27 | + | 9 | ) · (– | 8 | ) = –( | 54 | – | 9 | ) · (– | 8 | ) = – | 45 | · (– | 8 | ) = | 5 | = 2 | 1 | ; |
| 8 | 5 | 16 | 9 | 8 | 5 | 16 | 9 | 8 | 16 | 9 | 16 | 16 | 9 | 16 | 9 | 2 | 2 |
| 3) (– | 19 | + | 0,4 · (– | 3 | )) · 0,8 = (–0,76 + 0,4 · (–0,6)) · 0,8 = (–0,76 + (–0,24)) · 0,8 = –(0,76 + 0,24) · 0,8 = –1 · 0,8 = –0,8; |
| 25 | 5 |
| 4) – 9,6 · | 5 | + 9,06 – (–3,4)2 = –(9,6 · 0,3125) + 9,06 – (–3,4) · (–3,4) = –3 + 9,06 – 11,56 = –14,56 + 9,06 = –5,5. |
| 16 |