Question

Ułamki :) a. 3 2/11 * 4 15/21 = (Trzy całe i dwie jedenaste razy cztery całe i piętnaście dwudziestych pierwszych). b. (1 3/5 + 2,2 ) : 6 1/3 = c. 3 4/7 + 11/14 * 3 1/2 = d. 1 - 1/8 - 5/6 __________________ (podzielić) (1/4) do potęgi drugiej e. 5 1/2 * (1,5) do potęgi drugiej + 4 5/7 : 1 1/21 = f. (3 3/4 * 4/5 - 4 1/2 : 3 7/2) : 24 =

Answer 1

a)

3 2/11 x 4 15/21 = 35/11 x 99/21 = 35/1 x 9/21 = 5/1 x 9/3 = 45/3 = 15

b)

(1 3/5 + 2,2) : 6 1/3 = ( 1 3/5 + 2 2/10) : 6 1/3 =

= ( 1 6/10 + 2 2/10) : 10/3 = 3 8/10 x 3/10 = 38/10 x 3/10 = 114/100=1 14/100=

= 1 7/50

c)

3 4/7 + 11/4 x 3 1/2 = 3 4/7 + 11/4 x 7/2 = 3 4/7 + 77/8 = 3 32/56 + 539/56=

=3 571/56 = 13 11/56

d)

1 - 1/8 - 5/6             7/8 - 5/6                   42/48 - 40/48

____________  = _________________ = _____________________  =

(1/4)^2                      1/16                             1/16

 

 

= 2/48 : 1/16 = 2/48 x 16/1 = 2/3

 

e)

5 1/2 x (1,5)^2 + 4 5/7 : 1 1/21 = 11/2 x (3/2)^2 + 33/7 : 22/21=

= 11/2 x 9/4 + 33/7 x 21/22 = 99/8 + 3/7 x 21/1 = 12 3/8 + 9 = 21 3/8

 

f)

(3 3/4 x 4/5 - 4 1/2 : 3 7/2) : 24 =

= ( 15/4 x 4/5 - 9/2 : 13/2) : 24=

= ( 3 - 9/2 x 2/13) : 24 = (3- 18/26):24 =

= 2 8/26 : 24 = 60/26 x 1/24 = 15/182