Odpowiedzi

2009-12-08T17:55:59+01:00
6,75*2=13,5
6,75*2+13,5*2=13,5+27=40,5dm
2009-12-08T17:57:16+01:00
6 3/4*2= 13,5dm
O=13,5*2+6 3/4=27+ 13,5= 40,5
2009-12-08T17:58:09+01:00
6 3/4dm x 2 = 13 1/2dm
(6 3/4dm x 2) + (13 1/2dm x 2 ) =13 1/2dm + 27dm = 40 1/2dm

Odp.Obwód to 40 1/2dm.