Question

OBLICZ :

a) (2 3/5 - 1 1/5 ) * ( 2,8 - 3,7 ) =

b) (3 5/7 - 4 1/2 ) * (1,99 - 2, 06) =

c) (2 : 0,3 - 5 1/3 ) * ( 0,25 - 2/3) =

D) (2,6 : 1,2 - 4 1/2 ) : (0, 75 - 1/3) =

e) (1 - 3/5 ) (do kwadratu ! )

f) (4 - 3 1/3 ) (do kwadratu !! )

g) (1/3)(do kwadratu!) - (3/2)( do kwadratu!)

h) (2/5)(do kwadratu!) + (- 1/2) (do kwadratu)

Answer 1

a) (2 3/5 - 1 1/5 ) * ( 2,8 - 3,7 ) = 1,4*(-0,9)=-1,26

b) (3 5/7 - 4 1/2 ) * (1,99 - 2, 06) =(3 10/14-4 7/14)*(-0,07)=-1 3/14*(-7/100)=

-17/14*(-7/100)=17/200=0,085

c) (2 : 0,3 - 5 1/3 ) * ( 0,25 - 2/3) = (6 2/3-5 1/3)*(- 1/12)=1 1/3*(-1/12)=

4/3*(-1/12)=-1/9

D) (2,6 : 1,2 - 4 1/2 ) : (0, 75 - 1/3) = (2 1/6-4 1/2):5/12=-2 1/3*12/5=-7/3*12/5=

-28/5=-5,6

e) (1 - 3/5 ) (do kwadratu ! )=0,16

f) (4 - 3 1/3 ) (do kwadratu !! ) =1/9

g) (1/3)(do kwadratu!) - (3/2)( do kwadratu!)=1/9-9/4=4/36=81/36=-77/36=-2 5/36

h) (2/5)(do kwadratu!) + (- 1/2) (do kwadratu)=4/25+1/4=0,16+0,25=0,41

Answer 2

a) (2i3/5 -1i1/5)*(2,8 -3,7)= 1i2/5 * (-0,9)= 7/5 *(-9/10)= -63/50 = -1i13/50

 

b) (3i5/7 -4i1/2)*(1,99 -2,06)= (3i10/14 -4i7/14)*(-0,07)= (-11/14)*(-7/100)=

     = (-11/2) *(-1/100) = 11/200

 

c) (2:0,3 -5i1/3)*(0,25 -2/3)= (2:3/10 -5i1/3)*(1/4 -2/3)=(2*10/3 -5i1/3)*(3/12-8/12)=

    = (20/3 -16/3)*(-5/12)= 4/3 *(-5/12)= 1/3 *(-5/3)= - 5/9

 

d) (2,6:1,2 -4i1/2):(0,75 -1/3)= (2i3/5 :1i1/5 -4i1/2):(3/4 -1/3)=(13/5 :6/5-4i1/2):

    :(9/12 -4/12)=(13/5*5/6 -4i1/2):5/12= (13/1*1/6-4i1/2):5/12=(13/6 -4i3/6):        :5/12 = (13/6-27/6): 5/12= (-14/6 )*12/5 = (-14/1) *2/5 = -28/5= -5i3/5 

 

e) (1 -3/5)^2= (5/5 -3/5)^2 = (2/5)^2= 4/25

 

f) (4-3i1/3)^2= (3i3/3 -3i1/3)^2 = (2/3)^2= 4/9

 

g) (1/3)^2 - (3/2)^2 = 1/9 - 9/4 = 4/36 - 81/36= - 77/36= -2i5/36

 

h) (2/5)^2 +(-1/2)^2 = 4/25 +1/4 =16/100 + 25/100= 41/100