Question

5/85

Oblicz wartość wyrażeń :

a) (-2,5) : 12/3 -1,4 =

b) 12/5 * (-13/7) + 1/3 * [1+6:(-18)]=

c) 2,6-1/4 : [2-(1,75)] =

d) [-2/3-(-1,8):(-11/5)]:(-1/27) =

12/3 to jeden i dwie tzecie itp. ;)

Answer 1

a) (-2,5):1i2/3 -1,4= (-2i1/2) : 5/3 -1i4/10= (-5/2)*3/5 -1i4/10= (-1/2) *3/1 -1i4/10=

     = -3/2 -1i4/10= -1i1/2 -1i4/10= -1i 5/10 -1i4/10= -2 i9/10

 

b) 1i2/5 *(-1i3/7) +1/3*[1+6:(-18)] = 7/5 *(-10/7) +1/3 *[1 -6/18]= 1/1*(-2/1)+1/3*

     *[18/18 -6/18] = -2 +1/3* 12/18= -2 +1/1 *4/18= -2+4/18= -1i18/18 + 4/18 = 

      = -1 i14/18 = -1 i 7/9

 

c) 2,6 -1/4 :[2-(1,75)]= 2,6 -0,25 :[0,25]= 2,6 -1 = 1,6

 

d) [-2/3-(-1,8):(-1i1/5)]: (-1/27)= [-2/3 -(-1i4/5) : (-1i1/5)] :(-1/27)=

  =[-2/3-(-9/5):(-6/5)]:(-1/27)=[-2/3-(-9/5*(-5/6)]:(-1/27=[-2/3-(-3/1)*(-1/2)]: 

    :(-1/27)= [-2/3 -3/2]:(- 1/27)= [-4/6- 9/6] :(-1/27) = [-13/6 ]* (-27/1) =        

    = [-13/2] * (-9/1)=  117/2

Answer 2

a) 

b) 

c)

d)