Please I need help!!

1. Complete the gaps:
α) 2,3dm² = …......mm²
β) 4.670 mm² = m²
γ) 0,0054km² =................dm²
δ) 307,3 acre= km²

2. Complete the gaps:
a) 0,3m² =..........dm² =..............cm² = mm²
β) 0,056dm² =.............cm² = mm²
γ) 7,31 cm² = mm²

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Answer:

1a 2dm²= 20000mm² 3dm²=30000mm²

b 18898.8194926 m²

c 0.0054 km²= 540000 dm²

d 1.21931784007 km²

2a 30dm²=3000cm²=300000mm²

b 560cm²=56000mm²

c 7.31cm²=731mm²