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a ) 12 h a = 120 000 m 2 5 k m 2 = 5 000 000 m 2 b ) 2500 d m 2 = 25 m 2 90 000 d m 2 = 900 m 2 c ) 8 m 2 26 d m 2 = 8 26 100 m 2 45 d m 2 = 45 100 m 2 d ) 20 m 2 4 d m 2 = 20 4 100 m 2 7 m 2 7 d m 2 = 7 7 100 m 2
67 dam2 51m2 = 67 dam2 + m2 = dam2
82 dam2 7m2 = 82dam2 + m2 = dam2
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U
k m 2 |
h
m
2
|
d a m 2 | m 2 | d m 2 | c m 2 | m m 2 |
1 k m 2 =100 h m 2 | 1 h m 2 = 100 d a m 2 = 0,01 k m 2 | 1 d a m 2 = 100 m 2 = 0,01 h m 2 | 1 m 2 =100 m 2 =0,01 d a m 2 | 1
d
m
2
= 100
c
m
2
= 0,01
m
2
|
1 c m 2 = 1000 m m 2 = 0,01 d m 2 | 1 m m 2 = 0,01 c m 2 |
Chú ý : Khi đo diện tích ruộng đất người ta còn dùng đơn vị héc-ta (ha)
1ha = 10000 m 2
CÁI BÀI NÀY CÓ VẤN ĐỀ RỒI BẠN ƠI M2 ĐỔI RA DM2 MÀ CÁI NÀY BỊ LỖI
đâu mình chép trong sach giáo khoa toán lớp 5 trang 28 bài luyện tập
8ha = 80 000m2 72 000dm2 = 720 m2
15km2 = 15 000 000m2 90 000cm2 = 9 m2
a) 1,2075 km2=1207500 m2 b) 0,452 hm2 = 4520 m2
c) 12,075 ha = 120750 m2 d) 10,241 dam2=1024,1 m2
a) 1,2075 km2 = 1207500 m2 b) 0,452 hm2 = 4520 m2
c) 12,075 ha = 120750 m2 d) 10,241 dam2 = 1024,1 m2