2 liter + 2.000 cm3 = ……….mililiter

2 l= 20 ml
20+2.000=2.020

Karena:
1 mililiter = 1 cm3
maka:
2000cm3 = 2000 ml 
2 liter       = 2000 ml
jadi:
2000ml + 2000ml = 4000ml