Zamień :
a) 23,45 mm ² = ....... m ²
b) 4,25 cm ² = ....... m ²
c) 44,85 m ² = ....... cm ²
d) 128,6 km ² = ........ a
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1m = 1000mm
a) 23,45 mm ² = 23,45 : (10000 * 1000) = 23,45 : 1 000 000 = 0,00002345m ²
1m = 100cm
b) 4,25 cm ² = 4,25 : (100 * 100) = 4,25 : 10 000 = 0,000425m ²
c) 44,85 m ² = 44,85 * (100 * 100) = 44,85 * 10 000 = 448 500 cm ²
1km^2 = 100ha = 100 * 100a = 10 000a
d) 128,6 km ² = 128,6 * 10 000 = 1 286 000a