Question

oblicz;

c) 2 2/7*( 8/3-3 1/2)=

d)( 2/3 + 3/4) : ( 3/5+ 3/6)=

e) 2/3* ( 1 1/2 - 3/4 ) + ( 1 3/4 +1/2) : 1 1/3=

f) [18 4/5 - 2 2/3 : ( 1 - 5/6)] : 1 2/5=

g) 1 1/2+ 3 1/2 + 1/6

_______________kreska ułamkowa

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

h)1 - 10/27 :(-5/6) - 0.4*5=

i) 3 3/4*1,2+( -1/2:2,4-1/4)=

j) 8 *0,5*[-2/3*1 1/8+2/9*(-3/8)]=

prosze pomóżcie błagam na jutro na ocene dam naj;**

Answer 1

C) 2 2/7*( 8/3-3 1/2)= 16/7 * (2 4/6 - 3 3/6) = 16/7 * - 5/6 = - 1 19/21

d)( 2/3 + 3/4) : ( 3/5+ 3/6)= 1 5/12 : 1 1/10 = 1 19/66

e) 2/3* ( 1 1/2 - 3/4 ) + ( 1 3/4 +1/2) : 1 1/3= 2/3 * (6/4 - 3/4) + (7/4 + 2/4) = 2/3 * 3/4 + 2 1/4 = 1/2 + 2 1/4 = 2/4 + 2 1/4 = 2 3/4

f) [18 4/5 - 2 2/3 : ( 1 - 5/6)] : 1 2/5=[18 4/5 - 2 2/3 : 1/6] : 7/5 = [18 4/5 - 2 2/3 * 6] * 5/7 = [18 4/5 - 8/3 * 6 ] * 5/7 = [18 4/5 - 16 ] * 5/7 = 14/5 * 5/7 = 2

g) 1 1/2+ 3 1/2 + 1/6
   -------------------------------          = 
  3 3/4 :( 1/12- 5/6)

= 5 1/6 : [3 3/4 :( 1/12-10/12)] = 5 1/6 : [3 3/4 : (-9/12)] = 5 1/6 : [ 15/4 * (- 12/9)] = 31/6 : (-5) = 31/6 *(- 1/5) =  - 1 1/30

h)1 - 10/27 :(-5/6) - 0.4*5= 17/27 * (- 6/5) - 2 = - 102/135 - 2 =  - 1 11/45

i) 3 3/4*1,2+( -1/2:2,4-1/4)=15/4 * 1 2/10 + ( -1/2:2 4/10-1/4) = 15/4 * 12/10 + ( -1/2 :24/10-1/4) = 9/2 + (-1/2  * 10 /24 - 1/4) =  9/2 + (- 5/24 - 1/4 ) =   9/2 + (- 5/24 - 6/24) = 4 12/24 + (- 11/24) = 4 1/24

j) 8 *0,5*[-2/3*1 1/8+2/9*(-3/8)]= 4 * [-2/3*9/8 + (- 1/12)] = 4 * 3/4 - 1/12 = 3 - 1/12 = 2 11/12

Rany ile tego było..... ;)