Question

zamien na ulamki zwykle

0,9(2)=

1,(21)=

Answer 1

0,9(2)

10x=9,(2)

100x=92,(2)

90x=83

x=83/90

 

 

1,(21)

100x=121,(21)

10000x=12121,(21)

9900x=12000

99x=120

x=120/99=1 21/99=1 7/33

x=1 7/33