1t= ____kg 0.31kg=____g,2.5g=______mg,0.45t=___kg=________g,20mg=____g=__kg

问题描述:

1t= ____kg 0.31kg=____g,2.5g=______mg,0.45t=___kg=________g,20mg=____g=__kg

0.1t= 100kg
0.31kg=310g
2.5g=2500mg
0.45t=450kg=450000g
20mg=0.02g=0.00002kg