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.
how many decimeters are inadoor way
One.
50 decimeters
137.4 decimeters
30,000 decimeters.
16.51 decimeters.
1.374 decimeters
1 meter = 10 decimeters
600 millimeters in 6 decimeters
13.74 meters is 137.4 decimeters.
420 decimeters is 4200cm
1 foot is about 3.048 decimeters.