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1. \(\)Zet 129 mm² om in cm²\(\)
2. \(\)Zet 27 km² om in dam²\(\)
3. \(\)Zet 125 hm² om in dm²\(\)
4. \(\)Zet 140 hm² om in dm²\(\)
5. \(\)Zet 13 hm² om in dm²\(\)
6. \(\)Zet 373 m² om in dm²\(\)
7. \(\)Zet 53 mm² om in cm²\(\)
8. \(\)Zet 121 hm² om in km²\(\)
9. \(\)Zet 324 m² om in dm²\(\)
10. \(\)Zet 21 dm² om in mm²\(\)
11. \(\)Zet 25 mm² om in dm²\(\)
12. \(\)Zet 211 dm² om in cm²\(\)

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Verbetersleutel

1. \(129 \text{ }mm²=1{,}29\text{ }cm²\)
2. \(27 \text{ }km²=270000\text{ }dam²\)
3. \(125 \text{ }hm²=125000000\text{ }dm²\)
4. \(140 \text{ }hm²=140000000\text{ }dm²\)
5. \(13 \text{ }hm²=13000000\text{ }dm²\)
6. \(373 \text{ }m²=37300\text{ }dm²\)
7. \(53 \text{ }mm²=0{,}53\text{ }cm²\)
8. \(121 \text{ }hm²=1{,}21\text{ }km²\)
9. \(324 \text{ }m²=32400\text{ }dm²\)
10. \(21 \text{ }dm²=210000\text{ }mm²\)
11. \(25 \text{ }mm²=0{,}0025\text{ }dm²\)
12. \(211 \text{ }dm²=21100\text{ }cm²\)