200dm2= cm221000kg= g 5000mL= L 830km2= m26500kg= t 560000000g= t 6000mL+7L= L 47kg-32000g= g.
20000,21000000,5,830000000,6.5,560,13,15000.
(1)200dm2=20000cm2
(2)21000kg=21000000g
(3)5000mL=5L
(4)830km2=830000000m2
(5)6500kg=6.5t
(6)560000000g=560t
(7)6000mL+7L=13L
(6)47kg-32000g=15000g.
故答案为:20000,21000000,5,830000000,6.5,560,13,15000.