Question

Proszę rozwiązać te 2 zadania z liczb rzeczywistych:

1)

8: (-1⅗) - (4½ * 1⅔ - 3¾)
------------------------------------------
½ * 2½

2)

½ - ⅖ : (1⅔ - 2⅕)

----------------------

⅔* 1½ - ¾

Answer 1

8:(-1 3/5)-(4 1/2*1 2/3-3 3/4)

---------------------------------------- =

  1/2*2 1/2

 

8:(-8/5)-(9/2*5/3-3 3/4)

--------------------------------- =

  1/2*5/2

 

8*(-5/8)-(15/2-3 3/4)

------------------------------- =

  5/4

 

-1/5-(7 2/4-3 3/4)

----------------------- =

  5/4

 

-1/5-(6 6/4-3 3/4)

------------------------ =

  5/4

 

-1/5-3 3/4

-------------- =

 5/4

 

-4/20-3 15/20

------------------ =

  5/4

 

-3 19/20:5/4=-79/20*4/5=-79/25=-3  4/25

 

 

2)

 

1/2-2/5:(1 2/3-2 1/5)

--------------------------- =

  2/3*1 1/2-3/4

 

1/2-2/5:(1 10/15-2 3/15)

------------------------------- =

  2/3*3/2 -3/4

 

1/2-2/5:(1 10/15-1 18/15)

-------------------------------- =

 1-3/4

 

1/2-5/2*(-8/15)

--------------------- =

 1/4

 

1/2+4/3

------------ =

  1/4

 

3/6+8/6

----------- =

 1/4

 

9/6:1/4=9/6*4/1=18/3=6