(1)2.4m3=2400dm3;
(2)4.3dm3=4300cm3;
(3)700cm3=0.7dm3;
(4)500dm3=0.5m3;
(5)1.2L=1200ml;
(3)8400ml=8.4L.
故答案为:2400,4300,0.7,0.5,1200,8.4.
(1)2.4m3=2400dm3;
(2)4.3dm3=4300cm3;
(3)700cm3=0.7dm3;
(4)500dm3=0.5m3;
(5)1.2L=1200ml;
(3)8400ml=8.4L.
故答案为:2400,4300,0.7,0.5,1200,8.4.