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530dm2 = 53000cm2
846000cm2 = 846dm2
10km2 = 10000000m2
13dm2 29cm2 = 1329cm2
300dm2 = 3m2
9000000m2 = 9km2.
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{2}{8}km^23m^2=0,25km^23m^2=2500030000cm^2\)
\(\frac{2}{5}m^232dm^2=0,4m^232dm^2=7200cm^2\)
\(\frac{3}{8}km^224m^2=0,375km^224m^2=3750240000cm^2\)
\(\frac{2}{4}m^2321dm^2=0,5m^2321dm^2=37100cm^2\)
CHÚC BN HỌC TỐT!!!!!
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27000 kg = …270……… tạ
245780 kg =…245… tấn 780….kg
50 tấn 789 kg =…50789… kg
800 dm2 3cm2 =…803.. cm2
75689 cm2 = 7…….m2…5689..cm2
90 km2 5m2 = 90000005…..m2
270 tạ
245 tấn 780 kg
50789 kg
80003 cm2
7 m2 5689cm2
900005 m2
![](https://rs.olm.vn/images/avt/0.png?1311)
4m2 305cm2 = 4,000305 m2
1/4km2 = 25 000 000 m2
2dm2 35cm2 = 235 cm2
2/5dm2 = 40 cm2
9000m2 = 90 dm2
4m2 305cm2 = 4,000305 m2
1/4km2 = 25 000 000 m2
2dm2 35cm2 = =235 cm2
2/5dm2 = 40 cm2
9000m2 = 90 dm2
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bài 1:
130 dm2=13000 cm2
13dm2 29 cm2 =1329 cm2
34600 cm2 = 346 dm2
300 dm2 = 3m2
10 km2 = 10000000 m2
9000000m2=9km2
bài 2
số học sinh là 30 học sinh
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![](https://rs.olm.vn/images/avt/0.png?1311)
a) 1 m2 = 100 dm2
5 m2 = 500 dm2
500 dm2 =5 m2
b) 1 m2 50 dm2 = 150 dm2
4 m2 20 dm2 = 420 dm2
3 m2 9 dm2 = 309 dm2
![](https://rs.olm.vn/images/avt/0.png?1311)
\(1m^217cm^2=10017cm^2\)
\(6300dm^2=630000cm^2\)
\(78000dm^2=780m^2\)
\(7km^2=7000000m^2\)
\(20km^2=20000000m^2\)
\(50000000m^2=50km^2\)
9000000m2=9km2
5m2 35cm2 = 500dm2 0,35dm2 = 500,35 m2
tíck cho mik nha
9000000m2=9km2
5m235cm2=500,35dm2