No because they both equal 840 cm
1 dm is equal to 100 mm (as 1 dm = 10 cm 1 cm = 10 mm)
3.1 dm is equal to 31 cm. Remember that 1 dm is equal to 10 cm.
100
600
36 cm (centimetres) = 3.6 dm (decimetres)
40 dm = 400 cm
5 dm = 50 cm
One dm (decimeter) is 10 cm (centimeter) So: 50cm=5dm
7.6dm = 76cm
10 cm = 1.0 dm 1.5 dm = 15 cm
By unit of length and distance and conversion ,we can say that 1 dm=10 cm so, 4 dm=40 cm. hence , 4 dm is equal to 40 cm