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![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
5cm2 = 500mm2
12km2 = 1200hm2
1hm2 = 10000m2
7hm2 = 70000m2
1m2 = 1000cm2
5m2 = 50000cm2
![](https://rs.olm.vn/images/avt/0.png?1311)
\(5cm^2=500mm^2\)
\(12km^2=1200ha\)
\(1ha=10000m^2\)
\(5m^2=50000cm^2\)
....
\(ha=hm^2\)nha bạn
#) Trả lời :
a) 5 cm2 = 500 mm2 ; 12km2 = 1200 hm2
1 hm2 = 10 000 m2 ; 7hm2 = 70 000 m2
1 m2 = 10 000 cm2 ; 5 m2 = 50 000 cm2
12 m2 9 dm2 = 1209 dm2 ; 37 dam2 224 m2 = 3924 m2
b) 800 mm2 = 8 cm2 ; 3400 dm2 = 34 m2
12 000 hm2 = 120 km2 ; 150 cm2 = 1 dm2 50 cm2
90 000 m2 = 9 hm2 ; 2010 m2 = 20 dam2 20 m2
#~Will~be~Pens~#
![](https://rs.olm.vn/images/avt/0.png?1311)
12km2=120000000000cm2
12m2=120000cm2
12km2=1200000000dm2
câu 4 ko có đơn vị
\(12km^2=120000000000cm^2\)
\(12m^2=120000cm^2\)
\(12km^2=1200000000dm^2\)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(1hm^215dam^2=11500m^2\)
\(12km^24dam^2=12000400m^2\)
![](https://rs.olm.vn/images/avt/0.png?1311)
Ta có :
\(12km^2=120000m^2\)
\(4dam^2=400m^2\)
\(12km^24dam^2=120000+400=120400m^2\)
![](https://rs.olm.vn/images/avt/0.png?1311)
5dm2 18cm2 = 518cm2
1m2 38dm2 = 138dm2
16m2 = 160000cm2
1km2 = 1000000m2
12km2 376m2 = 12000376m2
Học tốt!