the answer is 126 decimeters. because decimeters is a smaller unit than meters.
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126dm is a smaller unit and denotes a higher degree of precision.
Greater.
No 1dm=10cm.
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.
It is: 3.4+5.65+6.85 = 15.9 dm