Question

Oblicz :
a. (-2,5):1 2/3-1,4= ?
b. 2,6-1/4:[2-(-1,75)]= ?
c. -1 1/3*(-0,75)-1 1/3
__________________ = ? ⇔ tu jest kreska ułamkowa :)
1/9-0,8:1 3/5
d. -6*0,28-0,24*(-6)= ?
e. 1 2/5*(-1 3/7)+1/3*(1+6:(-18))= ?

Daje naj :3

Answer 1

A)
(-2,5):1 i 2/3-1,4= 

= ( - 2 i 5/10) : 5/3 - 1 i 4/10=

= - 25/10 * 3/5 - 1 i 4/10= (skracam 25 z 5)

= - 5/10 * 3/1 - 1 i 4/10=

= - 15/10 - 1 i 4/10=

= - 1 i 5/10 - 1 i 4/10=

= - 2 i 9/10



b.
2,6-1/4:[2-(-1,75)]= 

= 2 i 6/10 - 1/4: [ 2 + 1,75] =

= 2 i 6/10  - 1/4 : 3,75 =

= 2 i 6/10 - 1/4 : 3 i 75/100 =

= 2 i 6/10 - 1/4 : 375/100 =

= 2 i 6/10 - 1/4 * 100/375 =

= 2 i 6/10 - 1/1 * 25/375=

= 2 i 6/10 - 25/375 =

= 2 i 450/750 - 50/750=

= 2 i 400/750 =

= 2 i 8/15



c.

-1 i 1/3*(-0,75)-1 1/3
---------------------------------- =
1/9-0,8:1 i 3/5


"""" 4/3 * (- 75/100) - 1 i 1/3
= ------------------------------------------- =
""""" 1/9 - 8/10 : 8/5



""""""" 4/3 * (-3/4) - 1 i 1/3
= ----------------------------------------- =
""""""1/9 - 8/10 * 5/8



""""1/1 * (-1/1) - 1 i 1/3
= ----------------------------------- =
"""" 1/9 - 1/2 * 1/1 



""""" - 1/1 - 1 i 1/3
= -------------------------- =
""""" 1/9 - 1/2



"""""-1 - 1 i 1/3
= ------------------------ =
""""" 2/18 - 9/18



""""" - 2 i 1/3
= -------------------- =
""""" - 7/18


= - 2 i 1/3 : ( - 7/18) =

= - 7/3 * ( - 18/7)=

= - 1/1 * ( - 6/1)=

= 6/1=

= 6



d.
-6*0,28-0,24*(-6)= 

= - 1,68 - ( - 1,44) =

= - 1,68 + 1,44=

= - 0,24




e.
1 i 2/5*(-1 i 3/7)+1/3*(1+6:(-18))= 

= 7/5 * (-10/7) + 1/3 * ( 1 + (-6/18) =

= 1/1 * (-2/1) + 1/3 * ( 1 - 6/18) =

= - 2/1 + 1/3 * (-12/18) =

= - 2 + 1/1 * (-4/18) =

= - 2 - 4/18=

= - 2 i 4/18=

= - 2 i 2/9