Cześć ;-)
Zadanie I
[tex]a] \ (-3)\cdot7=\boxed{-21}\\\\b] \ (-5)\cdot(-6)=\boxed{30}\\\\c] \ (-15):(-3)=\boxed5\\\\d] \ 27:(-9)=\boxed{-3}\\\\e] \ (-2)^3=(-2)\cdot(-2)\cdot(-2)=4\cdot(-2)=\boxed{-8}[/tex]
Pamiętaj, że
[tex](-)\cdot(+)=(-)\\\\(-)\cdot(-)=(+)\\\\(-):(+)=(-)\\\\(-):(-)=(+)[/tex]
Zadanie II
[tex](-4)+(-6)\cdot5=(-4)+(-30)=\\\\=-(4+30)=\boxed{-34}[/tex]
Zadanie III
[tex]pon.\rightarrow-2^oC\\\\wt.\rightarrow-5^oC\\\\sr.\rightarrow0^oC\\\\czw.\rightarrow1^oC\\\\pt.\rightarrow-2^oC\\\\sob.\rightarrow-3^oC\\\\niedz.\rightarrow4^oC\\\\\frac{-2^oC+(-5)^oC+0^oC+1^oC+(-2)^oC+(-3)^oC+4^oC}{7}=\frac{-(2+5+2+3)^oC+0^oC+1^oC+4^oC}{7}=\\\\=\frac{-12^oC+5^oC}{7}=\frac{-7^oC}{7}=\boxed{-1^oC}[/tex]
Odp. Średnia temperatura w tym tygodniu wyniosła -1°C.
Pozdrawiam!
