Viêt số thích hợp vào chỗ chấm:
a) 3,5m=........m.......dm b) 7,800m=.............cm
4,10m=.........m.......cm 1090mm=...........cm...........mm
2,09m=.........m.........cm 4,7mm=.............cm............mm
5,60m=..........m.........dm 9,4cm=........cm.............mm