Question

Oblicz a) 5 1/2*(1,5)do potęgi 2 -4 5/7 : 1 1/2 b) (3 3/4 * 4/5-4,5 : 3,5 ) : 24 c) 11 1/4 * (1 2/3 - 19/21* 0,7) d) 4 1/8 + (1,2-0,65):7 1/3 e) (2 1/3-1,6):(1,25*0,88)

Answer 1

a) 5 1/2*(1,5)² -4 5/7 : 1 1/2 =

 =  11/2 * 9/4 - 33/7 : 3/2 =

 = 99/8  - 33/7 * 2/3 =

 = 99/8 - 22/7 =

=693/56 - 176/56 =

=517/56 =

=9   13/56

b) (3 3/4 * 4/5-4,5 : 3,5 ) : 24=

  =  ( 15/4 * 4/5 - 9/2 * 2/7) * 1/24=

  = (3 - 9/7) * 1/24=

  = (3 - 1  2/7) * 1/24=

  = 1  5/7 *  1/24 =

  = 12/7 * 1/24 = 

= 1/14

  

c) 11 1/4 * (1 2/3 - 19/21* 0,7)=

 = 45/4 * (5/3 - 19/21 * 7/10)=

 = 45/4 * (5/3 - 19/30)=

= 45/4 * (50/30 -19/30)=

 = 45/4 *  31/30 =

= 279/24=

=12   15/24=

= 12  5/8

d) 4 1/8 + (1,2-0,65):7 1/3 =

  = 33/8 + 0,55 : 22/3 =

   = 33/8 + 11/20 *  3/22=

  = 33/8  + 3/40 =

  =165/40 + 3/40 =

= 168/40 =

 = 4  1/5

e) (2 1/3-1,6):(1,25*0,88) =

 = (7/3 - 8/5) : (125/100 * 88/100 )=

 = (35/15 - 24/15 ) : 11000/10000 =

 = 11/15 : 11/10 =

 = 11/15 * 10/11=

 = 2/3