360 dm2 45cm2 = bao nhieu m2
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\(3m^221dm^2=321dm^2\)
\(1m^245cm^2=10045cm^2\)
\(1km^2500000m^2=1500000m^2\)
\(20km^2=20000000m^2\)
\(2km^2345m^2=2000345m^2\)
\(1m^22345cm^2=12345cm^2\)
3 m2 21 dm2 = 321 dm2 1 m2 2345 cm2 = 12345 cm2
1 km2 500000 m2 = 1500000 m2 2km2 345 m2 = 2000345 m2
1 m2 45 cm2 = 10045 cm2
Bài 12:
\(15m^227dm^2=15,27m^2\\ 2cm^25mm^2=2,05cm^2\\ 34m^245cm^2=35,0045m^2\\ 7dm^230cm^2=7,3dm^2\)
Bài 13:
\(5dm^23cm^2=5,03dm^2\\ 12dm^2123mm^2=12,0123dm^2\\ 31dm^220mm^2=31,002dm^2\)
a) \(1m^2=100dm^2=10000cm^2\)
\(1dm^2=100cm^2=10000mm^2\)
\(1cm^2=100mm^2\)
\(1m^2=1000000mm^2\)
b) \(6200dm^2=62m^2\)
\(3600mm^2=36cm^2\)
\(54000cm^2=540dm^2\)
\(150000cm^2=1500m^2\)
\(247dm^2=2m^247dm^2\)
\(360mm^2=2cm^260mm^2\)
\(1580cm^2=15dm^280cm^2\)
\(5604dm^2=56m^24dm^2\)
111111111111111111111111+854242402141141410414778962-641040510012121-999999999999999 111122288+9999999999999999999999999999585856
1)45cm2=0,45dm2
2)34dm2=0,34m2
3)347dm2=34700cm2
chúc bạn học tốt !!!
3 , 6045 nha bạn