30 meters is 300 decimeters.
1500 cm because 1m=100cm=10 decimeters
10 decimeters is 10x10cm. So it would equal 100 cm. To convert 100 cm into metres, divide 100 by 100, which equals 1. Therefore 10 decimeters equal 1 meter.
There are no decimeters in a teaspoon. A teaspoon may be a measure of volume and a decimeter is a measure of length. That does not go together.
1 decimeter is 0.001 hectometer.
8400 millimeters are in 8.4 meters. There are 1000 millimeters in each meter, because in metric, the bases go Base (meters), Deci (decimeters), Centi (centimeters), Milli (millimeters), with each next step being 10x smaller.
50 decimetres = 500 centimetres
this conversion can not really be done, because 2.3 decimeters in one dimensional and liters are three dimensional, . If it were 2.3 decimeters cubed that would simply be equal to 2.3 liters