Question

prosze o pełne obliczenia(z wynikiem :d) zadanie 1) http://img23.imageshack.us/img23/8748/ccf2010120800000.jpg

Answer 1

a). 1/2 + 1,5 = 0,5 + 1,5 = 2

 

 

b). 3,2 - 1 i 1/3 = 3 i 2/10 - 1 i 1/3 = 3 i 6/30 - 1 i 10/30 = 1 i 16/30 = 1 i 4/5

 

 

c). 2,4 x 3/8 = 24/10 x 3/8 = 9/10

 

 

d). 2 i 3/4 : 2,75 = 2 i 3/4 : 2 i 3/4 = 11/4 x 4/11 = 44/44 = 1

 

 

e). 12 i 1/2 : 1/2 x 2,5 = 2,5 : 1/5 x 25/10 = 25/2 x 5/1 x 25/10 =125/2 x 25/10 = 625/4 = 156 i 1/4

 

 

f). 3 i 3/4 + 0.28 x 1 i 11/14 3,75 + 28/100 x 25/14 = 3,75 + 1/2 = 3,75 = 0.50 = 4,25

 

 

g). 5,7 : (5 i 3/7 - 3,8) = 5,7 : ( 5 i 3/7 - 3 i 8/10) = 57/10 : 1 i 46/70 = 57/10 : 70/116 = 399/116 = 3 i 51/116

 

 

h). 4,08 - 2,08 : 19/25 = 4,08 - 208/100 x 25/19 = 208/76 = 2 i 56/76 = 2 i 14/39

 

 

j). (0,2 + 1/2) 2 = (0,2 + 0,5) 2 = 0,7 z 0,7 = 0,49

 

:))

 

i to tyle

 

jbc to / - kreska ułamkowa... :d