30km= dm= 80cm= mm= 457km= dm=

Jawabannya adalah...
=> 30 km = ... dm
= 30 × 10000 = 300000 dm

=> 80 cm = ... mm
= 80 × 10 = 800 mm

=> 457 km = ... dm
= 457 × 10000 = 4570000

1). 30 km = .... Dm
Km → Dm = Dikali 10000
= 30 × 10000 = 300000 dm

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2). 80 Cm = .... Mm
Cm → Mm = Dikali 10
= 80 × 10 = 800 Mm

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3). 457 Km =... Dm
Km → Dm = Dikali 10000
= 457 × 10000 = 4570000 Dm

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Semoga membantu.
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