Question

Oblicz: [2/7-(-2i6/7)]x(-4)=

8-4 kreska ułamkowa -10+7:5-1 kreska ułamkowa -11+9=

[-2i3/8-(-1/12)]x(-1/2:3/4=

Proszę o jak najszybszą odpowiedź dam NAJ! Dzięki!

Answer 1

 [2/7-(-2i6/7)]x(-4)= [ 2/7 + 20/7 ] x (-4) =22/7 x (-4) = - 88/7 = -12   4/7

 

8-4                      4                     4

------------     ------------          -----------

-10+7:5-1     =   -10+7/5-1   = -10+1,4-1=  4 : (-9,6) : (-2) =

-----------         -------------     ------------

 -11+9                 -2                 -2

 

 =  4 : (- 96/10) * (-1/2) = 4 * (-10/96)*(-1/2)=10/48 = 5/24

 

[-2i3/8-(-1/12)]x(-1/2:3/4)= [ -19/8 + 1/12] x (-1/2 * 4/3) =

 = [-114/48 + 4/48] x(-2/3) = -110/48 x (-2/3) = 110/72 = 55/36 = 1  19/36