Question

Oblicz. skróć ułamki zwykłe
-2,4*2/3-0,5*(-4/5) do potęgi 2 i to wszystko dzielone przez -0,8*5/8+(-1/2)=

Answer 1

-2,4 * 2/3 -  0,5 * (-4/5)^2
----------------------------------
- 0,8 * 5/8  + (-1/2)




""""" - 2 i 4/10 *2/3 -  5/10 * 16/25
= ---------------------------------------------=
"""" - 8/10 * 5/8 - 1/2




"""""""- 24/10 * 2/3 -  1/5 * 8/5
= -------------------------------------------  =
""""" - 1/2 * 1/1 - 1/2





""""""" - 8/5 * 1/1 - 8/25
= ------------------------------- =
"""""""- 1/2 - 1/2




"""""" - 8/5 - 8/25
= ---------------------- =
"""""" - 2/2




""""" - 1 i 3/5 - 8/25
= ---------------------------- =
""""""" - 1




"""""""- 1 i 15/25 - 8/25  
=  ------------------------------- =
""""""""""" - 1



= - 1 i 23/25 : (-1) =

= 1 i 23/25

Answer 2

-2,4*2/3-0,5*(-4/5) do potęgi 2 i to wszystko dzielone przez -0,8*5/8+(-1/2)=
= (-24/10 * 2/3 - 1/2 * 16/25)/(-8/10 * 5/8 - 1/2) =
= (-12/5 * 2/3 - 8/25)/(-1/2 - 1/2) = (-24/15 - 8/25)/(-1) =
= (-1 9/15 - 8/25)/(-1) = (-1 45/75 - 24/75)/(-1) =
= -1 69/75/(-1) = 1 69/75