Question

Cum rezolv: 2x[0,(3)+0,2(6)]=?
Dau funda

Answer 1

0, ( 3) = 3 / 9 = 1 / 3

0,2(6 ) = ( 26 - 2 ) / 90 = 24 / 90 = 8 / 30 = 4 / 15

2 x ( 1 / 3 + 4 / 15 ) = 1,2

= 2 x ( 5 / 15 + 4 / 15 ) =

= 2 x 9 / 15 =

= 18 / 15 =

= 6 / 5 =

= 1,2

Answer 2

convine sa le transformi in fractii ordinare ; asa tebuie procedat intotdeauna cand ai inmultiri cu fractii periodice

deci 0,(3) +(26-2)/90=1/3+24/90=1/3+4/15=5/15+4/15=9/15=3/5

2*(3/5)=6/5=1,2