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![](https://rs.olm.vn/images/avt/0.png?1311)
280mm
3120dm
30m
0,75dam
1050cm
15000m
45hm
18km
725cm
1m65dm
5058m
2km80m
![](https://rs.olm.vn/images/avt/0.png?1311)
2,539m= 2m 5dm 3cm 9mm
7,306m= 7m 3dm 6mm
2,586km= 2km 586m
8,2km= 8km 200m
![](https://rs.olm.vn/images/avt/0.png?1311)
300 mm2 = 3 cm2
500 cm2 = 5 dm2
700 dm2 = 7 m2
6 000 000 mm2 = 6 m2
6 m2 = 6 000 000 mm2
200 mm2 = 2 cm2
40 000 mm2 = 4 dm2
![](https://rs.olm.vn/images/avt/0.png?1311)
1 dm2 23 cm2 = 123 cm2
2 m2 4 dm2 = 204 dm2
30 mm2 5 dm2 = 5,003 dm2
30 dam2 10 m2 = 10,3 m2
20 ha 6 dam2 = 2006 dam2
40 km2 2 ha = 4002 ha
1 dm2 23 cm2 = 123 cm2
2 m2 4 dm2 = 204 dm2
30 mm2 5 dm2 = 5,003 dm2
30 dam2 10 m2 = 10,3 m2
20 hm2 6 dam2 = 2006 dam2
40 km2 2 hm2 = 4002 hm2
![](https://rs.olm.vn/images/avt/0.png?1311)
a ) 2,539m = 2m 5dm 3cm 9mm b ) 7,306m = 7m 3dm 6mm
= 2m 53cm 9mm = 7m 30cm 6mm
= 2m 539mm = 7m 306mm
= 2539mm = 7306mm
c ) 2,586km = 2km 586m d ) 8,2km = 8km 200m
= 2586m = 8200
![](https://rs.olm.vn/images/avt/0.png?1311)
1 mm2 = 0,01 cm2
1 mm2 = 0,0001 dm2
1 mm2 = 0,000001 m2
1mm = 0,1 cm
1mm = 0,01 dm
1mm = 0,001 m
1 mm2 = 0,01 cm2
1 mm2 = 0,0001 dm2
1 mm2 = 0,000001 m2
1 mm = 0,1 cm
1 mm = 0,01 dm
1 mm = 0,001 m
3mm=0.3cm
2hm=0.2km
8dm=0.8m
5mm=0.005
5cm=0.5m
13m=0.13m
2731cm=27m31cm
4005mm=40dm5mm
3mm = 3/10cm = 0, 3cm
2hm = 2/10km = 0, 2km
8dm = 8/10m = 0, 8m
5mm = 5/1000m = 0, 005m
5cm = 5/100m = 0, 05m
13m = 13/100hm = 0, 13hm
3cm 1mm = 31/1000m = 0, 031m
13 013m = 13km 13m
2731cm = 27m 31cm
4005mm = 40dm 5mm