40dm = 4m
4m = 4000mm
To convert decimeters (dm) to millimeters (mm), you multiply by 100 since 1 dm equals 100 mm. Therefore, 40 dm is equal to 40 x 100 mm, which equals 4,000 mm.
1 dm = 1/10 m10 dm = 1 m40 dm = 4 m
6.3 centimeters equals 63 mm.
1000 mm equals one meter
1.5 cm equals 15 mm.
1 km equals 100,000 mm
15 mm
6,800 mm
63 mm
457.2 mm.
84 mm ;-)
It equals 35 mm.