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Greater.
1 m = 10 dm
No.
Since 1 m = 10 dm, then 1 m 60 dm + 30 dm = 70 dm + 30 dm = 100 dm = 10m or 1 m 60 dm + 30 dm = 1m 90dm = 10 m.
No. The deci- prefix means one tenth: 1/10 = 0.1 The kilo- prefix means a thousand: 1000 0.1 < 1000 → deci- < kilo- → a decimenter is less than a kilometer 1 dm = 1/10 m → 1m = 10 dm 1 km = 1000 m = 1000 x 10 dm = 10000 dm