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ZBIRKA POTPUNO RIJEŠENIH ZADATAKA

Fiz--7--PDF - MIM-Sraga

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Fizika-7<br />

8.<br />

Izrazite u metrima kvadratnim:<br />

a) 30 000 mm e) 32 785 mm<br />

2 2<br />

b) 2 814 cm f) 58 km<br />

2 2<br />

c) 0,2 km g) 421 dm<br />

2 2<br />

d) 25 dm h) 813 cm<br />

2 2<br />

Rj.<br />

a) 30 000 mm = m<br />

2 2<br />

Pravilo pretvaranja:<br />

100 100 100<br />

2 2 2<br />

m dm cm mm<br />

dijeli<br />

2<br />

30 000<br />

1 000 000<br />

3<br />

2 −2 2<br />

= = 0,03 m = 3⋅10 m<br />

100<br />

2 2<br />

2<br />

30 000 mm = 30 000:1 000 000 m = m =<br />

b) 2 814 cm = m<br />

2 2<br />

Pravilo pretvaranja:<br />

100 100<br />

2 2<br />

m dm cm<br />

dijeli<br />

2<br />

2 814<br />

10 000<br />

2 2 2<br />

2<br />

2 814 cm = 2 814:10 000 m = m = 0,2814 m<br />

c) 0,2 km = m<br />

2 2<br />

Pravilo pretvaranja:<br />

km<br />

množi<br />

<br />

m<br />

1 000 000<br />

2 2<br />

⋅<br />

2<br />

⋅<br />

10<br />

⋅<br />

2<br />

= 200 000 m<br />

5 2<br />

= 2⋅10 m<br />

2 2 2<br />

2<br />

0,2 km = 0,2 1 000 000 m = 1 000 000 m = 2 100 000 m =<br />

Ivana Sraga<br />

26<br />

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