2,9 l + 650 ml= cc pake caranya

2,9 l + 0,65 l = 3,55 l

2,9 l + 650 ml = (2,9 x 1.000) + (650 x 1)
                       = 2.900 cc + 650 cc
                       = 3.550 cc

Semoga Membantu :)