viết số đo sau dưới dạng số đo có đơn vị là hecta: 65000 m2, 9,2 km2
(1ha = 1hm2 = 10000 m2 , 1a = 1 dam2 = 100 m2 = 0,01 ha)
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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
a) 1 m2 = 100 dm2 = 10000 cm2 = 1000000 mm2
1 ha = 10000 m2
1 km2 = 100 ha = 1000000 m2
b) 1 m2 = 0,01 dam2
1m2 = 0,000001 km2
1 ha = 0,01km2
4 ha = 0,04 km2
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
67 dam2 51m2 = 67 dam2 + m2 = dam2
82 dam2 7m2 = 82dam2 + m2 = dam2
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a) 34dm2 = 0,34m2
5290cm2 = 0,529m2
4ha = 40000m2
b) 3,2dam2 = 320m2
0,5km2 = 500000m2
0,15ha = 1500m2
a, 34dm2 = 0.34m2
5290cm2 = 0.529m2
4ha = 40 000m2
b, 3.2dam2 = 0.032m2
0.5km2 = 0.005m2
0.15ha = 1500m2
1. Viết số thích hợp vào chỗ trống :
a, 1 km2 = 100 ha b, 1m2 = 0,01 dam2 =.0.001ha
1ha = .10000 m2 15 m2 = 0.15 dam2 =0.015. hm2
7 hm2 = 70000m2 8000 m2 =0.8ha
12 dam2 = 1200 m2 1400 cm2 =0.14. m2
3ha = 30000m2 5ha =0.05 km2
34 dm2 =. 0.34m2 3,2 dam2 = 320m2
5290 cm2 =0.5290m2 0,5 km2 = 500000m2
4ha = 400000m2 0,15 ha =1500m2
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
65000m2=6,5ha
8,2km2=820ha
9,2 nhé bạn
chứ ko phải 8,2