Question

w załączniku

przynajmniej żeby były 2 przykłady:)

Answer 1

a)

2/3 + 1/5

------------- + (3  2/17  - 4  6/13)*(0,75 - 3/4) =

2/5 - 1/2

 

     10/15 + 3/15

=------------------- + (3  2/17 - 4  6/13) * (3/4 - 3/4)=

     4/10 -5/10

 

     13/15

=--------------- + ( 3  2/17  -  4  6/13) * 0  =

     -1/10

 

= 13/15 * (-10) + 0  = - 26/3 = -8  2/3

 

b)

2/3 -[0,8 * 3/(-2²) -(-2²)/5 ] : (-1  1/2) =

= 2/3 - [ 8/10 * 3/4 - 4/5] : (-3/2)=

 = 2/3 - [6/10 -4/5 ] * (-2/3) =

 = 2/3 - [3/5 - 4/5 ] *(-2/3) =

 = 2/3 - (-1/5)*(-2/3) =

= 2/3 - 2/15 = 10/15 - 2/15 =  8/15

 

c) (1/3 - 1/2) :(5/3 - 5/4 )-(0,25 - 3/8 : 0,625) =

  = (2/6 - 3/6) : (20/12 - 15/12) - ( 1/4 - 3/8 :  5/8) =

  = (-1/6) : (5/12) - (1/4 - 3/8 *  8/5)=

  = (-1/6) * (12/5) - (1/4 - 3/5) =

  = -2/5 - (5/20 - 12/20) =

  = -2/5 - (-7/20)= -8/20 + 7/20 = -1/20

 

d)

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

 = (1/4 + 1/8) : (4/9 - 1/9) =

 = ( 2/8 + 1/8 ) : (3/9)= 3/8 : 1/3 = 3/8 * 3 = 9/8 = 1  1/8