Question

11. Oblicz:
a)2,85 x (-8) =
b) (-2,2) do potęgi 3. =
c) -0,4 x (-1/5) do potęgi 2 =
d) -5,6: (-0,7) =
12. Oblicz:
a) 4,65 - (-2 i 1/6) =
b) -5 i 2/5 - 4,5 =
c) - 4 i 1/3 + 2,3 =
d) -8,2 - ( - 3 i 1/8) =

Answer 1

11
a)2,85x(-8)=-22,8
b)(-2,2)^3=-10,648
c)-0,4x(-1/5)^2=-4/10x1/25=-4/250=-2/125=-0,016
d)-5,6:(-0,7)=8

12
a)4,65-(-2 1/6)=465/100+13/6=1395/300+650/300=2045/300=6 245/300=6 49/60
b)-5 2,5-4,5=-5,4-4,5=-9,9
c)-4 1/3+2,3=-13/3+23/10=-130/30+69/30=-61/30=-2,03
d)-8,2-(-3 1/8)=-8,2+3,125=-5,075