Đáp án:
Bài 5:
3m7cm= 3,07m. 12dam²30m²= 12,3dam².
9dm4cm= 0,94m. 5km²155dam²= 5,155km².
5km20m= 5,002km. 8m²7dm²= 8,7m².
515 cm= 5,15m. 78dm²5cm²= 78,5dm².
2dm8mm= 2,8dm. 6m²5cm²= 6,05m².
Bài 6:
9,5m= 950cm. 45,6dam²= 4506m².
10,7dm= 1070mm. 4,05hm²= 40500m².
2,56km= 2560m. 9,1km²= 9100000m².
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