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![](https://rs.olm.vn/images/avt/0.png?1311)
Bài 1
7ha=70000m2
16ha=160000m2
1km2=100ha
\(\dfrac{1}{10}\)ha=1000m2
\(\dfrac{1}{4}\)ha=2500m2
\(\dfrac{1}{100}\)ha=100m2
Bài 2
54km2<540ha S
71ha>80000m2 Đ
5m28dm2=\(5\dfrac{8}{10}\)m2 S
![](https://rs.olm.vn/images/avt/0.png?1311)
7/10 ha = 7000 m2
5/4 km2 = 125 ha
3/100 ha = 300 m2
4/5 km2 = 800 000 m2
\(\dfrac{7}{10}\)ha = 7000 m2 \(\dfrac{5}{4}\)km2 = 125 ha
\(\dfrac{3}{100}\)ha = 300 m2 \(\dfrac{4}{5}\)km2 = 800000 m2
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\dfrac{15}{100}km=0,15km;2\dfrac{3}{4}m=2,75m;25kg=0,25\)tạ; 45kg=0,45 tạ
![](https://rs.olm.vn/images/avt/0.png?1311)
\(8ha=80000m^2\)
\(\dfrac{1}{2}ha=5000m^2\)
\(15ha=150000ha\)
\(\dfrac{1}{100}ha=100m^2\)
\(20ha=200000m^2\)
\(800000m^2=80ha\)
\(600000m^2=60ha\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a) \(73m^28cm^2=73\dfrac{8}{10000}m^2\)
b) \(105m27dm^2=105\dfrac{7}{100}m^2\)
c) \(21m^28mm^2=21\dfrac{8}{1000000}m^2\)
d) \(7m^225cm^2=700\dfrac{25}{100}dm^2\)
e) \(45m^29mm^2=450000\dfrac{9}{100}cm^2\)
Câu B em nhé
Cảm ơn ạ![yeu yeu](https://hoc24.vn/vendor/cke24/plugins/smiley/images/yeu.png)