Jawabanmu

2014-08-29T13:37:45+07:00
0,5 = 5/10 = 1/2

Jadi,

20 : 1/2 =
= 20 x 2 = 40 <~ Jawaban
2014-08-29T13:38:38+07:00
20
  0,5
-------- +
20,5

jawabannya adl 20,5